Claim Check

Grounded verification and extraction for AI agents: fact-check a claim against a source with verbatim quotes, or turn invoices, receipts, job posts and any text into typed JSON. Pay per call over x402, no API key. Daily model quota published at /health. Credit: 402 Index (MIT)

Listed · $0.05 USDC/request · 2 endpoints · Verification · base network · x402 protocol

Networks: Base (accepted)

Discovery is free. Agents search the catalogue here. Payment happens on the listing 402, not on PayAPI.

url https://payapi.market/mcp

Listing facts

Provider

Unclaimed

Hosted at

claim-check.agent-utils.workers.dev

Category

Verification

Price

$0.05 USDC per request

Endpoints

2

Payment networks

Base

Settlement-verified

Not yet. Listed, not paid for by PayAPI Market.

Listed on PayAPI Market

2026-10-30

About this API

Claim Check is listed in the Verification category with pricing at $0.05 USDC/request.

Payments settle on base in USDC via the x402 protocol. AI agents discover this API through the PayAPI Market MCP server and pay per request without API keys or accounts.

This API exposes 2 endpoints.

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Paste this on your site. The link points at this listing. Listing is free and providers keep 100%.

Markdown

[![Listed on PayAPI Market](https://payapi.market/badge/claim-check.svg)](https://payapi.market/api/claim-check)

HTML

<a href="https://payapi.market/api/claim-check"><img src="https://payapi.market/badge/claim-check.svg" alt="Listed on PayAPI Market" height="20"></a>

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Questions about this API

What does Claim Check do?

Grounded verification and extraction for AI agents: fact-check a claim against a source with verbatim quotes, or turn invoices, receipts, job posts and any text into typed JSON. Pay per call over x402, no API key. Daily model quota published at /health. Credit: 402 Index (MIT) It is provided by Unclaimed.

How much does Claim Check cost?

Claim Check is priced at $0.05 USDC per request, paid per call with no subscription. The exact amount for each call is in the HTTP 402 response before any money moves.

Do I need an API key or account to use Claim Check?

No. Claim Check uses the x402 protocol, so an agent pays per request in USDC on Base and gets the response, with no API key, account or signup.

Has Claim Check been verified?

Not yet. Claim Check is listed and answers an x402 payment challenge, but PayAPI Market has not paid for a call to it, so it carries no settlement-verified badge.

How does an AI agent find Claim Check?

Through the free PayAPI Market MCP server at https://payapi.market/mcp, using search_apis or get_api, or over plain HTTP at https://payapi.market/agent/search. Discovery is free; the agent pays the provider directly on the listing's own 402.

More Verification APIs · Browse the marketplace · List your own API

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