AgentIndex x402 MCP server

• agent_healthFree

  Fresh operational audit of any public agent or paid API: reachability, latency, HTTP status, x402 challenge, price/network/payTo, OpenAPI, agent card and MCP manifest. Returns a 0-100 score, verdict and issues. Try GET /agent-health/sample.

• ask_modelFree

  437 models, no account, no API key, pay per call in USDC - OpenAI-compatible chat completions and AI inference gateway (Claude, GPT, Gemini, Llama, Mistral and more in one endpoint). Price: from $0.001, computed from your max_tokens × model rate × 1.10 (you sign a ceiling; unused tokens are not refunded). 20s server-side timeout - never charged if it fires; set your client timeout to 30s. Try GET /v1/chat/completions/sample.

• base_allowanceFree

  ERC20 allowance on Base mainnet via RPC: how much a spender is approved to move from an owner balance, read with allowance(owner,spender) eth_call.

• base_basenameFree

  Resolve a Basename, Base's native ENS-equivalent, to its wallet address via the L2 Basenames resolver.

• base_blockFree

  Fetch a Base mainnet block header and transaction hashes by number, tag (latest/earliest/safe/finalized), or hash via eth_getBlockByNumber/eth_getBlockByHash.

• base_block-numberFree

  Latest Base mainnet block height via eth_blockNumber - the current chain tip.

• base_callFree

  Generic read-only eth_call against any Base mainnet contract - pass raw calldata, get the raw return data back.

• base_can-sellFree

  Can I sell this token? Honeypot check that simulates a real buy then a real sell of a Base mainnet token in one atomic on-chain call via Uniswap V2 - if the sell reverts, that is a honeypot, reported with the exact decoded reason. Factual, never predictive.

• base_chain-idFree

  Base mainnet chain ID (EIP-155) via eth_chainId - confirm which network you're actually talking to.

• base_codeFree

  Check whether a Base mainnet address is a contract via eth_getCode - returns bytecode size, zero for an externally-owned account.

• base_contractFree

  Contract introspection on Base mainnet - is it a contract, bytecode size, best-effort owner(), and whether it's a proxy.

• base_erc1155-balanceFree

  ERC1155 multi-token balance for a wallet and token id on Base mainnet via balanceOf(address,uint256).

• base_erc20-balanceFree

  ERC20 token balance for a wallet on Base mainnet - balanceOf() and decimals() batched into one Multicall3 round trip.

• base_erc20-transfersFree

  ERC20 Transfer event logs for one token over a Base mainnet block range (max 2,000 blocks) via eth_getLogs.

• base_erc721-tokensFree

  NFT holdings for a wallet in one Base ERC721 collection, owned token IDs via ERC721Enumerable (tokenOfOwnerByIndex) - up to 20 tokens, requires the collection to implement Enumerable.

• base_estimate-gasFree

  Gas estimate for a Base mainnet swap or any other call (to/from/value/data) via eth_estimateGas, without broadcasting a transaction.

• base_eventsFree

  Smart contract event logs on Base mainnet (Base contract events) via eth_getLogs - filter by contract address and up to 4 topics, up to 2,000 blocks, raw logs with topics, data, block and tx hash.

• base_live-balanceFree

  Native ETH balance plus up to 20 ERC20 token balances for one wallet on Base mainnet, in a single Multicall3 round trip regardless of token count.

• base_network-infoFree

  Base mainnet network info in one call: chain ID, block height, and current gas price (wei and gwei).

• base_nft-metadataFree

  NFT metadata URI for an ERC721 token on Base mainnet via tokenURI - the on-chain pointer (IPFS, HTTP, or data URI), not a fetch of the document itself.

• base_nft-ownerFree

  Who owns this NFT? ERC721 owner lookup on Base mainnet via ownerOf(tokenId).

• base_nonceFree

  Next transaction nonce for any Base mainnet wallet via eth_getTransactionCount - how many transactions it has sent.

• base_pendingFree

  The current pending Base mainnet block (mempool, not yet mined) - unconfirmed transactions via eth_getBlockByNumber('pending').

• base_proxyFree

  Is this Base contract an upgradeable proxy? Proxy contract detection for EIP-1967 (transparent/UUPS), beacon, or EIP-1822 patterns, returning the implementation address.

• base_quoteFree

  Slippage estimate, swap quote, and best DEX price on Base - compares Uniswap v2, Uniswap v3, and Aerodrome on-chain via Multicall3, returns amount received, chosen path, and price impact.

• base_receiptFree

  Transaction receipt via eth_getTransactionReceipt - status, gas used, and event logs for a mined Base mainnet transaction.

• base_simulateFree

  Simulate a Base mainnet transaction before sending it - will it succeed, estimated gas, and the decoded revert reason if it would fail.

• base_storageFree

  Read a contract storage slot on Base mainnet via eth_getStorageAt - the raw 32-byte value, decoded as hex and unsigned integer, zero-filled if unset.

• base_total-supplyFree

  Total supply for an ERC20 (normalized by decimals()) or ERC721 (raw count, no decimals) contract on Base mainnet.

• base_txFree

  Base transaction lookup by hash - sender, recipient, value, calldata, gas and block, live from Base mainnet via eth_getTransactionByHash.

• can_paywrite actionFree

  Check whether a Base wallet holds enough USDC to pay an x402 amount (default $0.001). Returns balance, can_pay, shortfall. The checklist agents run before spending. Try GET /can-pay/sample.

• classifyFree

  Text classification with your own custom labels (2-20) - categorize a support ticket, a review, or any text into the best-fitting label, with a confidence score and an alternate label. Powered by Jev, falling back to a Groq-hosted LLM if Jev is slow or unavailable - under 4.5s guaranteed. Try GET /classify/sample.

• contact_kairoswrite actionFree

  Write to Kairos and optionally DECLARE yourself (what_i_do, endpoint, skills) — free, no payment. Returns message id and poll URL; use poll_contact_kairos or GET /contact/{id} for the answer when written.

• coordination_thread_schemaFree

  Return the JSON Schema for coordination thread turns (v1) — free. One structured turn in a multi-agent conversation.

• coordination_thread_snapshot_schemaFree

  Return the JSON Schema for coordination thread snapshots (v1) — free. Bundle turns, cards and open pledges for handoff between runs.

• cryptoFree

  Live spot prices for crypto coins (BTC, ETH, SOL, ...) in USD or another fiat, with 24h change. Accepts tickers or CoinGecko ids. Try GET /crypto/sample.

• decideFree

  Ask up to 20 typed yes/no, multiple-choice or ordinal-scale questions about one shared piece of context in a single call - each answered with a real probability (Jev decision primitives), not generated text. Powered by Jev (TypeSafe System One). $0.001 per call, no OpenRouter or TypeSafe account needed. Try GET /decide/sample.

• detect_languageFree

  Detect the language of a piece of text - free, no payment. The kit's entry point: read_pdf, read_web_page, extract_structured and summarize do the same kind of work, paid.

• digest_tool_resultFree

  Stable SHA-256 digest of an MCP tool_result so agents can verify payloads before settling payment — free, no account.

• discover_mcp_serversFree

  Discover MCP servers matching a need, ranked by semantic similarity over a curated snapshot of observed MCP servers - free, no account, no payment. Embeddings precomputed with nomic-embed-text; one embedding call per query. Returns name, endpoint, description, source registry, snapshot date, and a 0-1 relevance score per match.

• discover_semanticFree

  Find MCP servers matching a need, ranked by semantic similarity over a curated snapshot of MCP servers. Returns name, endpoint, description, source registry and a 0-1 relevance per match. Paid POST: up to 25 matches. Try GET /discover/sample.

• encoding_detectFree

  Detect whether hex-encoded bytes are ASCII, UTF-8, or UTF-16 with a BOM, by decode-validity and BOM presence (not statistical language detection).

• encoding_transcodeFree

  Convert text between utf-8, base64, hex, URL-percent-encoding and ascii representations.

• extract_structuredFree

  Extract structured data from a URL or raw text into strict JSON matching a schema you provide. Fields the content doesn't support come back null - never an invented or approximate value, and an unmatchable schema returns an explicit error. Try GET /extract/sample. Part of the AgentIndex content kit (pdf, web-read, extract, summarize, detect-language) - see GET /capabilities.

• fact_checkFree

  Fact-check verdict written by Claude Haiku 5.5 (Anthropic) from real web sources: supported/contradicted/mixed/unverifiable, each source with its stance (supports/contradicts/neutral). Answer in a few seconds. Try GET /fact-check/sample. Independently monitored: lumierepaycheck.org/e?url=https://x402.agentindex.world/fact-check

• fraction_simplifyFree

  Simplify a fraction to lowest terms and return its decimal value.

• gas_priceFree

  Read the live gas price, EIP-1559 base fee and estimated native-transfer cost on Base, Ethereum, Polygon, Arbitrum or Optimism. No RPC key or account. Try GET /gas-price/sample.

• geo_bboxFree

  Bounding box (min/max lat and lon) enclosing a list of points.

• geo_bearingFree

  Initial compass bearing (0-360 degrees, clockwise from true north) from point 1 to point 2.

• geo_distanceFree

  Great-circle distance between two lat/lon points (haversine formula). Returns km, mi or nm.

• geo_dmsFree

  Convert decimal degrees to degrees/minutes/seconds, or DMS back to decimal degrees.

• geo_geohashFree

  Encode a lat/lon point into a geohash string (precision 1-12 characters).

• geo_midpointFree

  Geographic (great-circle) midpoint between two lat/lon points.

• geo_point-in-polygonFree

  Ray-casting point-in-polygon test (planar approximation - fine for city/region-scale polygons).

• get_agent_trust_kitFree

  Return the agent trust kit manifest (v1) — free index of JSON schemas, HTTP validators, MCP tool names and suggested buyer/coordination workflows.

• get_welcome_salonFree

  Kairos welcome salon — same JSON as GET /accueil. Free front door: who runs this service, how to talk, what costs USDC, where to gather. Start here before paid routes.

• guardFree

  Ask whether a tool call should run automatically, need human confirmation, or be denied, given the user's request - returns allow/ask/deny with a probability. Advisory only: like any LLM-based judge it is sensitive to prompt injection in the request or tool call, so the calling agent must keep the final decision, not delegate it outright. Powered by Jev (TypeSafe System One). $0.001 per call, no OpenRouter or TypeSafe account needed. Try GET /guard/sample.

• hash_hashFree

  Compute an MD5, SHA-1, SHA-256 or SHA-512 hex digest of text.

• hash_hmacFree

  Compute an HMAC (MD5, SHA-1, SHA-256 or SHA-512) of text with a given key.

• honest_delivery_refusal_schemaFree

  Return the JSON Schema for honest delivery refusals (v1) — free. Structured failure record when no tool_result can be delivered.

• intentFree

  Intent detection: classify text as a question, request, complaint, compliment, or other, with a confidence score and an alternate label. Powered by Jev, with an automatic Groq-hosted LLM fallback if Jev is slow or unavailable - under 4.5s guaranteed. Try GET /intent/sample.

• jobsFree

  Multi-query web research, read and synthesized into one sourced JSON brief in a single call - what would otherwise cost an agent twenty calls and its whole context window. Free status polling and result retrieval. Try GET /jobs/sample.

• json_diffFree

  Recursive diff between two JSON documents: added, removed and changed paths.

• json_flattenFree

  Flatten a nested JSON document into single-level dotted-path keys.

• json_queryFree

  Query a JSON document with a JSONPath expression.

• json_schema-inferFree

  Infer a basic JSON Schema (types, object properties, array item type) from an example document.

• json_validateFree

  Validate a JSON document against a JSON Schema.

• languageFree

  Language detection: identify which of 20 common languages (or "other") a text is written in, with a confidence score. Powered by Jev, with an automatic Groq-hosted LLM fallback if Jev is slow or unavailable - under 4.5s guaranteed. Try GET /language/sample.

• llm_claude_sonnetFree

  Claude Sonnet API - pay per call, no API key. OpenAI-format chat completions on anthropic/claude-sonnet-5.5, pinned to Anthropic's own OpenRouter endpoint for reliability. You sign a fixed price computed from your max_tokens; unused tokens are not refunded. 20s server-side timeout - never charged if it fires; set your client timeout to 30s. Try GET /llm/claude-sonnet/sample.

• llm_gpt_miniFree

  GPT Mini API - pay per call, no API key. OpenAI-format chat completions on openai/gpt-5.4-mini, pinned to OpenAI's own OpenRouter endpoint for reliability. You sign a fixed price computed from your max_tokens; unused tokens are not refunded. 20s server-side timeout with an automatic 2nd-provider retry if the first is slow - never charged if both miss; set your client timeout to 30s. Try GET /llm/gpt-mini/sample.

• llm_llamaFree

  Llama API - pay per call, no API key. OpenAI-format chat completions on meta-llama/llama-4-maverick, pinned to DeepInfra for reliability. You sign a fixed price computed from your max_tokens; unused tokens are not refunded. 20s server-side timeout - never charged if it fires; set your client timeout to 30s. Try GET /llm/llama/sample.

• mesh_claim_bountyFree

  Kairos agent mesh board — register nodes, post open bounties, claim work. Free. Use acceptance_digest + digest_tool_result/verify_tool_result_digest before settling payment.

• mesh_ledgerFree

  Kairos agent mesh board — register nodes, post open bounties, claim work. Free. Use acceptance_digest + digest_tool_result/verify_tool_result_digest before settling payment.

• mesh_list_bountiesFree

  Kairos agent mesh board — register nodes, post open bounties, claim work. Free. Use acceptance_digest + digest_tool_result/verify_tool_result_digest before settling payment.

• mesh_list_nodesFree

  Kairos agent mesh board — register nodes, post open bounties, claim work. Free. Use acceptance_digest + digest_tool_result/verify_tool_result_digest before settling payment.

• mesh_post_bountywrite actionFree

  Kairos agent mesh board — register nodes, post open bounties, claim work. Free. Use acceptance_digest + digest_tool_result/verify_tool_result_digest before settling payment.

• mesh_register_nodeFree

  Kairos agent mesh board — register nodes, post open bounties, claim work. Free. Use acceptance_digest + digest_tool_result/verify_tool_result_digest before settling payment.

• money_allocateFree

  Split an integer amount of cents among N ratios with zero rounding loss (Fowler's allocation algorithm) - the parts always sum back to the original amount.

• money_formatFree

  Format a numeric amount with thousands separators, a chosen decimal precision and a currency symbol.

• newsFree

  Top Hacker News headlines right now - title, URL, score, comments. Fresh links for agents that need current tech/startup signal. Try GET /news/sample.

• number_ordinalFree

  Convert an integer to its English ordinal form (1st, 2nd, 3rd, 4th, 11th, 21st...).

• number_radixFree

  Convert a number's string representation from one base (2-36) to another.

• number_romanFree

  Convert an integer (1-3999) to a Roman numeral, or a Roman numeral back to an integer.

• number_wordsFree

  Convert an integer into English words.

• pii_checkFree

  PII detection: flag whether text contains personally identifiable information (name plus contact details, email, phone, address, government ID, financial account) with a confidence score. Powered by Jev, with an automatic Groq-hosted LLM fallback if Jev is slow or unavailable - under 4.5s guaranteed. Try GET /pii-check/sample.

• poll_contact_kairoswrite actionFree

  Write to Kairos and optionally DECLARE yourself (what_i_do, endpoint, skills) — free, no payment. Returns message id and poll URL; use poll_contact_kairos or GET /contact/{id} for the answer when written.

• probeFree

  Probe any public URL and report if it is an x402 paywall - price, network, payTo, scheme. Shop paywalls before you spend. Try GET /probe/sample.

• rankFree

  Rank up to 50 documents by relevance to a query in a single call - each document returned with its relevance probability, sorted highest first. Powered by Jev (TypeSafe System One). $0.001 per call, no OpenRouter or TypeSafe account needed. Try GET /rank/sample.

• read_pdfFree

  Extract a public PDF (by HTTPS URL or base64) into clean Markdown - headings and tables preserved via layout-aware parsing, plus title/author/page count/date metadata and a real token count. Text content itself is never generated or altered, only its structure is inferred. Try GET /pdf/sample. Part of the AgentIndex content kit (pdf, web-read, extract, summarize, detect-language) - see GET /capabilities.

• read_web_pageFree

  Fetch URL content as Markdown: read any web page and get clean Markdown - navigation, ads and boilerplate stripped, links resolved, plus a real token count. The same extraction /search uses on result pages, exposed standalone for a URL you already have. Try GET /web-read/sample. Part of the AgentIndex content kit (pdf, web-read, extract, summarize, detect-language) - see GET /capabilities.

• regex_replaceFree

  Replace regular expression matches in text, with an optional max-replacement count.

• regex_testFree

  Test a regular expression against text; returns match status, capture groups and span.

• relationship_memory_schemaFree

  Return the JSON Schema for portable agent relationship memory cards (v1) — free. Remember interlocutors, not isolated messages.

• researchFree

  Jev-powered research: routed search, cited answer, claims verified against sources. Ask a question, get a 5-8 sentence answer, each claim tagged to a numbered source, built from real page content - no invented facts. A fast paid LLM writes it, under 4.5s guaranteed; on a rare miss, a no-LLM extractive fallback (top sentences from the sources, picked by Jev) takes over instead, marked "synthesis":"extractive". Try GET /research/sample.

• return_visit_pledge_schemaFree

  Return the JSON Schema for return visit pledges (v1) — free. Commit to come back to a peer or thread by a deadline.

• searchFree

  Jev-routed web search: each query goes to the best specialised source (code, facts, news, prices), results ranked by relevance. 28/30 test queries answered. Up to 10 results per query, each with title, URL, snippet, short extract and publish date. Up to 5 queries per call, merged and de-duplicated. No account, no API key. Try GET /search/sample. Part of the AgentIndex content kit (pdf, web-read, extract, summarize, detect-language) - see GET /capabilities.

• sentimentFree

  Sentiment analysis: classify text as positive, negative, or neutral with a confidence score and an alternate label. Powered by Jev, with an automatic Groq-hosted LLM fallback if Jev is slow or unavailable ("engine":"jev"|"fallback" in the response) - under 4.5s guaranteed. Try GET /sentiment/sample.

• spam_checkFree

  Spam detection: classify text as spam or not spam with a confidence score. Powered by Jev, with an automatic Groq-hosted LLM fallback if Jev is slow or unavailable - under 4.5s guaranteed. Try GET /spam-check/sample.

• stats_correlationFree

  Pearson correlation coefficient between two equal-length numeric series.

• stats_percentileFree

  Nth percentile of a list of numbers (linear interpolation between closest ranks).

• stats_regressionFree

  Ordinary least squares simple linear regression (y = slope*x + intercept) with R-squared.

• stats_summaryFree

  Descriptive statistics for a list of numbers: count, mean, median, sample stdev/variance, min, max.

• summarizeFree

  Summarize a URL, raw text or HTML at the length you request - short, medium or long - with the source noted. Neutral and factual, no invented facts. Try GET /summarize/sample. Part of the AgentIndex content kit (pdf, web-read, extract, summarize, detect-language) - see GET /capabilities.

• text_caseFree

  Convert text between case styles: snake_case, camelCase, PascalCase, kebab-case, Title Case, CONSTANT_CASE.

• text_diffFree

  Unified line diff between two texts, plus an overall similarity ratio (0-1).

• text_readabilityFree

  Flesch Reading Ease and Flesch-Kincaid Grade Level scores for English text (standard public formulas, heuristic syllable counting).

• text_slugFree

  Slugify text: strip accents, lowercase, replace non-alphanumerics with a separator.

• time_addFree

  Add a fixed duration (days/hours/minutes/seconds) to an ISO 8601 datetime.

• time_betweenFree

  Duration between two ISO 8601 datetimes, as total seconds and a days/hours/minutes/seconds breakdown.

• time_business-daysFree

  Count weekdays (Mon-Fri) between two dates, inclusive of both endpoints.

• time_convertFree

  Convert an ISO 8601 datetime from one IANA timezone to another (handles DST automatically).

• time_formatFree

  Format an ISO 8601 datetime using a strftime pattern.

• time_humanizeFree

  Human-readable relative time ('2 hours ago', 'in 3 days') between a datetime and a reference (default now).

• time_iso-weekFree

  ISO 8601 week number, ISO year and ISO weekday (1=Monday) for a date.

• time_parseFree

  Parse a date/time string (ISO 8601 by default, or a given strptime format) into its components.

• token_riskFree

  Base token risk scan: on-chain rug check and honeypot-style flag detection for any ERC-20, no GoPlus, DexScreener or other vendor - real Base token safety. Reads bytecode for mint/blacklist/pause/tax powers, EIP-1967 proxy, renounced ownership, plus Uniswap v2/v3 and Aerodrome liquidity. A Jev avoid/caution/acceptable verdict leads the response, raw signals follow. Holder concentration included only when history fits 1-2 log queries. Try GET /token-risk/sample.

• tool_delivery_receipt_schemaFree

  Return the JSON Schema for portable tool delivery receipts (v1) — free. Link x402 payment metadata to a tool_result SHA-256 digest.

• toxicityFree

  Toxicity detection: classify text as toxic or not toxic (hate speech, harassment, threats, severe offensive language) with a confidence score. Powered by Jev, with an automatic Groq-hosted LLM fallback if Jev is slow or unavailable - under 4.5s guaranteed. Try GET /toxicity/sample.

• translateFree

  Translate up to 200 text segments in a single call - the same result that would otherwise take 200 separate calls to translate a whole file. Markdown, HTML and {x} placeholders preserved per segment, order and count kept intact, source language auto-detected, automatic fallback across multiple models for uptime, providers that train on submitted prompts excluded. A single string also works. No account, no API key. Try GET /translate/sample.

• unit_convertFree

  Convert a value between units of length, mass, volume or temperature (C/F/K).

• validate_coordination_thread_snapshotFree

  Validate a coordination thread snapshot against the v1 schema — free. Pass the snapshot object as JSON.

• validate_coordination_thread_turnFree

  Validate a coordination thread turn against the v1 schema — free. Pass the turn object as JSON.

• validate_eanFree

  EAN-8 or EAN-13 barcode checksum validation (auto-detected by length).

• validate_honest_delivery_refusalFree

  Validate an honest delivery refusal against the v1 schema — free.

• validate_ibanFree

  ISO 13616 IBAN mod-97 checksum validation, with optional BIC (ISO 9362) format check.

• validate_imeiFree

  IMEI (15-digit mobile device identifier) Luhn checksum validation.

• validate_isbnFree

  ISBN-10 or ISBN-13 checksum validation (auto-detected by length).

• validate_isinFree

  ISIN (ISO 6166 security identifier) Luhn checksum validation.

• validate_luhnFree

  Luhn (mod 10) checksum validation, as used by most payment card numbers.

• validate_relationship_memoryFree

  Validate a relationship memory card against the v1 schema — free. Pass the card object as JSON.

• validate_return_visit_pledgeFree

  Validate a return visit pledge against the v1 schema — free. Pass the pledge object as JSON.

• validate_routingFree

  US ABA bank routing number (9-digit) checksum validation.

• validate_siretFree

  French SIRET (14-digit business establishment number) Luhn checksum validation. Note: the rare La Poste SIREN exception to the standard rule is not applied.

• validate_tool_delivery_receiptFree

  Validate a tool delivery receipt against the v1 schema — free. Pass receipt JSON; optional content re-verifies delivery.digest.

• validate_vinFree

  North American VIN check-digit validation (NHTSA standard, position 9) plus WMI manufacturer lookup for a small set of known codes.

• verifyFree

  Check whether a source supports, contradicts, or gives insufficient information about a claim - a typed verdict with a real probability, not generated text. Powered by Jev (TypeSafe System One). $0.001 per call, no OpenRouter or TypeSafe account needed. Try GET /verify/sample.

• verify_tool_result_digestFree

  Recompute the canonical digest and return match=true/false — free. Use after a paid tool call to confirm the payload.

• wallet_balanceFree

  Read native coin and USDC balances for any EVM wallet on Base, Ethereum, Polygon, Arbitrum or Optimism, with atomic amounts and current block. No RPC key or account. Try GET /wallet-balance/sample.

• wallet_intelligenceFree

  One call replaces wallet-balance and gas reads across Base, Ethereum, Polygon, Arbitrum and Optimism. Returns native and USDC balances, current blocks, fees and Base x402 payment readiness. One signature instead of ten paid requests. Try GET /wallet-intelligence/sample.

• weatherFree

  Current weather and a 3-day forecast for any city or lat/lon - temperature, humidity, wind, conditions. No account, no API key. Try GET /weather/sample.

• x402_echoFree

  Cheapest possible Base-mainnet x402 conformance call: settle $0.001 of USDC and receive payer identity, request echo and receipt. Built for agents testing wallets, Payment-Signature, facilitators and settlement. Try GET /x402-echo/sample.

• –Code scanremote-only server, no package to scann/a
• Live reliabilityremote reachable in 1988ms20/20
• Tool poisoning141 tool descriptions checked15/15
• Auth qualityopen endpoint exposes 4 write-action tools with no auth3/15
• Maintenancelast push 4 days ago15/15
• Maintainer identityendpoint served from the registry-verified namespace domain8/10

Safety score

81/100

higher than 67% of 3,471 Web search servers

Tools

141

the typical Web search server has 5

Tools that change things

3%

typical: 0%. Fewer write tools means less an agent can break

Uptime

100%

of our recent checks; the typical remote Web search server answers 100%

Response time

489 ms

faster than 36% of 2,238 Web search servers

Grade history

• 2026-10-16restoreC → Bscore 81: Write-action tools reachable without authentication

AgentIndex x402: common questions

Is AgentIndex x402 MCP server safe?

Mostly: it is graded B (81/100). Read the AgentIndex x402 safety report

How do I install AgentIndex x402?

It runs remotely at x402.agentindex.world. Add it to Claude Code, Cursor, VS Code or Claude Desktop with the snippets above, or call it through the mcp.market gateway without installing anything.

Does AgentIndex x402 need an API key?

Not as far as the registry entry and our scan can tell: no credentials are declared or required.

Is AgentIndex x402 maintained?

The last commit was 24 days ago (2026-10-12). The latest release is v1.2.0.

Is AgentIndex x402 up?

100% of our last 28 checks got an answer. We check remote servers about four times a day.

What can I use instead of AgentIndex x402?

Servers from other publishers that do the same job: Free Search MCP server, searxNcrawl MCP server and Brave MCP server.

How does AgentIndex x402 compare with other Web search MCP servers?

safety score 81/100 (higher than 67% of 3,471 Web search servers); tools 141 (the typical Web search server has 5); tools that change things 3% (typical: 0%. Fewer write tools means less an agent can break). Full comparison.