Anchor X402 MCP server

online · 100% uptime

by hypeprinter007-stack·io.github.hypeprinter007-stack/anchor-x402·v0.3.2·1 stars

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x402-paid agent tools: 18 over HTTP, 14 over stdio. USDC per call, no API key.

A91/100grade A

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Safety scan

A91/100

full report

Adoption

Growing

1 stars170 downloads/wk

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If you have run it, two minutes of your experience saves the next person an afternoon.

Anchor X402 tools (18)

write = sends, deletes, buys or posts

anchor_hashFree
Anchor a 32-byte hash to Base + Solana mainnet in parallel. Returns both tx URLs as cryptographic proof of when the hash existed. $0.005 USDC.
attest_decisionFree
Attest a decision over (input_hash, output_hash, decision): sign it yourself, or omit the signature and the treasury signs for you — then dual-chain anchor. Returns the signer, on-chain proof URLs, and a free re-verify URL. $0.010 USDC.
aura_readFree
Read the aura of anything — color, tier (S/A/B/C/D/F), score 0-9999, description. $0.01 USDC.
decode_calldataFree
Decode raw EVM calldata into function name + typed parameters via openchain.xyz + eth_abi. EVM-only. $0.001 USDC.
decode_txFree
Structured decode of any mainnet transaction by hash. Supports Base, Ethereum, Solana. Mined txs cached. $0.001 USDC.
grade_targetFree
Academic letter grade with red-pen marginalia for anything. $0.01 USDC.
intel_walletFree
Unified wallet intelligence bundle. ONE call: balances on Base + Ethereum + Solana, USDC, tx counts, ENS/SNS reverse, sanctions verdict. 8-10 parallel sources. $0.005 USDC.
investigate_walletFree
Agent-driven wallet due diligence — multi-step investigation, signed markdown report + JSON sidecar, dual-chain anchored. Async — returns job_id; poll /v1/investigate/status/{job_id} for the deliverable. ETA 5-10 min. $1.77 USDC.
ledger_reportFree
Signed + dual-chain-anchored x402 expense report (markdown + CSV, async job). $0.35 USDC.
ledger_summaryFree
x402 spend accounting for any Base wallet — totals + per-service breakdown reconstructed from chain data. $0.01 USDC.
oracle_verdictFree
Yes/no oracle with dual-chain anchored verdict (Base + Solana). $0.05 USDC.
parse_datetimeFree
Parse freeform datetime strings into ISO 8601 + components + relative time + confidence. $0.001 USDC.
resolve_nameFree
Cross-chain name resolution: ENS (.eth) and Bonfida SNS (.sol). Returns resolved address(es). 1h cache. $0.001 USDC.
roast_targetFree
Witty roast of any target — wallet, tweet, idea, code, anything. $0.05 USDC.
roll_randomFree
Verifiable RNG — cryptographically-random integer(s) signed by the treasury key. Drop-in VRF for game studios. $0.001 USDC.
screen_walletFree
Wallet risk pre-flight for agent payments: OFAC SDN sanctions plus address-reputation (drainer, phishing, mixer, laundering) resolved to an allow/review/block recommendation with per-signal detail. $0.005 USDC.
tldr_textFree
Summarize a URL or pasted text into 3-5 concise bullets. $0.01 USDC.
token_priceFree
USD spot price for any major token. By symbol or chain+contract. CoinGecko-backed, 60s cache. $0.001 USDC.

Public scan report

scanner v0.1.10 · 2026-11-03 · same rubric, same numbers if you re-run it

no findings

Code scan5 source files scanned25/25
Live reliabilityremote reachable in 789ms20/20
Tool poisoning18 tool descriptions checked15/15
Auth qualityopen endpoint, read-only tools10/15
Maintenancelast push 17 days ago15/15
Maintainer identityregistry namespace matches repository owner6/10

Overall 91/100. Components that don't apply are left out of the denominator. Any critical finding is an F.Rubric Appeal a finding JSON

How Anchor X402 compares

Against every graded AI and agents MCP server, from our own scans and uptime checks. Updated after each scan run.

Safety score: 91/100; higher than 88% of 4,461 AI and agents servers
Tools: 18; the typical AI and agents server has 6
Tools that change things: 0%; typical: 0%. Fewer write tools means less an agent can break
Uptime: 100%; of our recent checks; the typical remote AI and agents server answers 100%
Response time: 249 ms; faster than 56% of 2,334 AI and agents servers
GitHub stars: 1; more than 50% of 2,713 AI and agents servers
Downloads a week: 170; more than 72% of 1,554 AI and agents servers with a package

What its tools let an agent do: 18 read

Install Anchor X402 in Claude Code, Cursor or VS Code

claude mcp add --transport http anchor-x402 https://api.anchor-x402.com/mcp

Add to Cursor

What the publisher says

From the Anchor X402 repository's README, as published. We do not edit it. Read it on GitHub

anchor-x402-mcp

MCP server exposing 14 anchor-x402 services as tools any Claude Desktop / Cursor / Codex / Continue agent can call. Pay-per-use USDC via x402 on Base mainnet — no API keys, no subscriptions.

Two transports — pick by who holds the wallet key

This package (stdio) needs a funded EVM private key in the local process (ANCHORWALLETPRIVATE_KEY) and pays for each call on your behalf. Convenient, but you are handing a hot key to a process.

Streamable HTTP — POST https://api.anchor-x402.com/mcp — needs no install and no key handover. It exposes all 18 services (four more than this package: rollrandom, investigatewallet, ledgersummary, ledgerreport), and you pay per call with a PAYMENT-SIGNATURE header, so your key never leaves your side.

{
  "mcpServers": {
    "anchor-x402": { "url": "https://api.anchor-x402.com/mcp" }
  }
}

Clients that speak remote MCP natively take the url form above. For one that only launches stdio processes, bridge it:

{
  "mcpServers": {
    "anchor-x402": {
      "command": "npx",
      "args": ["-y", "mcp-remote", "https://api.anchor-x402.com/mcp"]
    }
  }
}

Protocol revisions supported: 2026-07-28, 2025-11-25, 2025-06-18, 2025-03-26 — both the stateless era and the initialize handshake era, on one endpoint. server/discover and tools/list are free; tools/call is paid.

Payment is the ordinary x402 dance, surfaced inside MCP rather than around it: an unpaid tools/call returns a result (not a JSON-RPC error) with isError: true and the challenge in structuredContent.accepts, plus the canonical payment-required header. Sign one of the options and retry the identical call with PAYMENT-SIGNATURE. The challenge comes back as a result on purpose — an agent can read it and pay, whereas a JSON-RPC error would be swallowed by the client before the model ever saw it.

Server card: /.well-known/mcp/server-card.json. A worked client, including the adapter that bridges a stock x402 fetch wrapper to the MCP result shape, is in examples/agent/mcp-paid-call.mjs.

The rest of this README covers the stdio package.

What an agent gets

Fourteen tools, $0.001–$0.05 per call.

Commodity primitives (9, $0.001–$0.02):

Universal LLM endpoints (5, $0.01–$0.05) — added in v0.2:

Shortened. The full README is on GitHub.

Nothing above is checked by us. What we check is on the safety report.

Anchor X402: common questions

Is Anchor X402 MCP server safe?: Yes, by our scan: it is graded A (91/100). Read the Anchor X402 safety report
How do I install Anchor X402?: It runs remotely at api.anchor-x402.com. 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 Anchor X402 need an API key?: Yes. The registry entry asks for ANCHOR_WALLET_PRIVATE_KEY.
Is Anchor X402 maintained?: The last commit was 19 days ago (2026-10-17). The latest release is v0.3.2.
Is Anchor 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 Anchor X402?: Servers from other publishers that do the same job: Mockserver MCP server, Ausca MCP server and agent-device MCP server.
How does Anchor X402 compare with other AI and agents MCP servers?: safety score 91/100 (higher than 88% of 4,461 AI and agents servers); tools 18 (the typical AI and agents server has 6); tools that change things 0% (typical: 0%. Fewer write tools means less an agent can break). Full comparison.

Alternatives to Anchor X402

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not reviewed
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Run it through the gateway

With the gateway added, ask your agent for it by name:

agent prompt

call io.github.hypeprinter007-stack/anchor-x402 → anchor_hash

Free per call. Metered, capped by your key, logged for reliability.

Add the gateway (gw.mcp.market)

Rating: —
Safety grade: A · 91/100
Stars: 1
Downloads/wk: 170
Price: Free
Licence: MIT
Transport: Remote · mixed
Uptime: 100% · 28/28 checks
Version: 0.3.2
Category: AI and agents
Last release: 2026-10-17

Credentials it needs

ANCHOR_WALLET_PRIVATE_KEYsecretEVM private key (0x-prefixed hex). The wallet pays for x402 calls in USDC on Base mainnet. Fund with USDC before use.

Endpoint

https://api.anchor-x402.com/mcp

streamable-http

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