x402 Crypto Price API
Paid per call with the x402 protocol. An unpaid request returns HTTP 402 with an x402 v2 PaymentRequired challenge; the agent pays USDC on Base mainnet (scheme=exact) and retries with the X-Payment header, and the JSON response is returned. No API key, no account, no subscription. Payment settles directly to the provider wallet on Base, with no intermediary. The endpoint is validated as x402 v2 and carries a Bazaar discovery extension with full input and output JSON schemas, published at https://x402-agent.kariguetoazul.workers.dev/.well-known/x402.json. Six paid endpoints are available in total: whois/RDAP, dual-resolver DNS, crypto prices, GitHub trending, .gitignore generation and static code review, priced from $0.001 to $0.010 per call.
1 of 6 routes settlement-verified · $0.001–$0.01 USDC/request · 6 endpoints · Finance · base network · x402 protocol
Verified routes
GET /api/crypto· $0.002 · 2026-10-02 · 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/mcpAbout this API
x402 Crypto Price API is listed in the Finance category with pricing at $0.001–$0.01 USDC/request. One route has been settlement-verified by PayAPI Market on 2026-10-02. 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 6 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 x402 Agent