crosscheck: independent review of an agent's draft

Name: crosscheck: independent review of an agent's draft
Brand: crosscheck
Availability: InStock

Before your human sees it, send your draft (email, report, summary, answer) and get a structured JSON verdict from an independent reviewer plus a signed receipt. Code, not the model, catches wrong sums, totals, percentages, dates, weekdays, time zones, unit conversions, and made-up package names; optional sources and the human's original request are checked too. $0.02 per check. Same service also offers accept ($0.03, checks a deliverable against its task) and skillcheck ($0.03, security review of a skill or MCP server before install). Free price preview: GET https://crosscheckapi.com/v1/quote?draft=... Docs: https://crosscheckapi.com/llms.txt

1 of 3 routes settlement-verified · $0.02–$0.03 USDC/request · 3 endpoints / 4 tools · Verification · base network · x402 protocol

Verified routes

POST /v1/check · $0.02 · 2026-09-27 · receipt

Other routes are unverified.

Networks: Base (settlement-verified)

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

url https://payapi.market/mcp

About this API

crosscheck: independent review of an agent's draft is listed in the Verification category with pricing at $0.02–$0.03 USDC/request. One route has been settlement-verified by PayAPI Market on 2026-09-27. View receipt on Basescan.

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 3 endpoints. Only the verified route has been tested by PayAPI Market. Other routes are unverified.

How to call this API

Every protected route returns HTTP 402 with x402 payment requirements. An agent pays the stated USDC amount on Base and retries with the payment header. No API keys, no accounts. Browse the marketplace or list your own API.

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By crosscheck