Official Source Evidence alternatives

Pay-per-call MCP tools (crypto/DeFi data, web reading, AI tasks) in USDC over x402 on Base.

Israeli invoice payment gate with PAY/HOLD/BLOCK decisions and public company-registry evidence.

3

Anyway Possible Paid Agent Utilities

by anyway-possible

A

Paid x402 tools for merchant intelligence, Base payment readiness, and verifiable web evidence.

4

X402 List

by x402-list.com

A

Find and vet x402 payment APIs before your agent pays one: uptime, price, on-chain volume.

5

Agent402.Tools: pay-per-call web tools

by MikeyPetrillo

A

Agentic Finance: 500+ agent tools, multi-chain USDC over x402 or MPP, free via PoW or card credits

6

PipRail

by piprail

B

Budget-bound x402 payment wallet for AI agents — pays HTTP 402 URLs, capped locally. No backend.

7

POPCORN MCP

by violetclaire

B

Signed time and SHA-256 witness receipts for agents, with offline verification and x402 payment.

8

X402 Data Gateway

by epistemedeus

B

Paid x402 and MPP tools for agent discovery, payment safety, data, and DeFi.

Lint an HTTP endpoint's x402 402 conformance; decode X-PAYMENT blobs; inspect a facilitator.

10

gate402 merchant checkout

by ogenalabs.com

A

Drop-in x402 checkout for merchants: issue terms, verify payment. $0.01 each.

11

AgentData — crypto market data with a checkable record

by speteai

A

Verifiable crypto signals, recorded history and always-on monitoring for AI agents via x402 on Base.

12

Agent Data Pro

by OrionSmithers

A

Research articles and live crypto prices for AI agents via x402 on Base.

Authorize x402 payments before signing with request-bound, signed safety decisions.

14

Blackwall X402 Guardrail

by blackwalltier.com

A

Keyless hosted MCP: pre-signature x402 payment verdict (GO/HOLD/STOP) with a signed receipt.

15

Blockrun

by BlockRunAI

B

Web search, deep research, prediction markets & crypto data for AI agents. Pay per call via x402.

16

Hive Intelligence MCP

by hiveintelligence.xyz

B

Evidence-backed crypto due diligence with sources, freshness, and a runtime receipt on every call.

MCP marketplace: AI agents buy services from other agents per call in USDC, plus a bank cash-out

18

RoboSystems

by robosystems.ai

A

Accounting knowledge graphs: SEC XBRL filings, QuickBooks ledgers, reports and forecasts over MCP.

19

Churnkey

by churnkey.co

A

Read and manage Churnkey cancel flows, retention metrics, and payment recovery

20

K-Data — Korean Sell-Side Research & Market Data

by juh5ng

A

Korean equity research, analyst revisions, kimchi premium and news via x402.

21

Précis Finance MCP

by precis-finance

B

Public read-only Précis Finance MCP demo with synthetic data; no account or credentials required.

22

Stelar Signals

by StelarDigital

A

Crypto market signals and portfolio telemetry. 6 tools pay-per-call in USDC, no API key.

23

Signalfuse

by hypeprinter007-stack

B

11 tools: crypto signals, sentiment, macro regime, arena, search, exec. x402 pay-per-call.

24

Aurora Agent

by MurariAmbati

A

FIBER decision-context compiler with honest omission accounting: 259 evidence-bearing MCP tools.