x402basequality 0.35

Pay-per-call premium API access on Base via x402 — $0.02/request in USDC.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/payments/347

What it does

This endpoint at lowpaymentfee.com provides "Premium API Access" via the x402 payment protocol. It is one of many endpoints offered by the platform, which spans categories including Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure utilities. All endpoints on the platform are priced at $0.02 per request, paid in USDC on the Base network with no API keys, rate limits, or commitments required.

The specific endpoint `/api/v1/payments/347` returns a valid x402 challenge (HTTP 402) requesting payment of up to 20,000 base units of USDC (0x8335…2913 on Base, 6 decimals = $0.02) via the "exact" scheme. The payment is directed to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout. The endpoint accepts POST requests and returns application/json.

However, the crawled documentation pages (/docs, /api, /pricing, /README) all returned only a "Connect wallet" stub with no actual API documentation, request/response schemas, or usage examples. It is unclear what specific data or functionality this particular `/payments/347` endpoint returns, as the platform's landing page does not list it among its advertised APIs. Without documentation or schema details, agents must discover behavior empirically.

Capabilities

x402-paymentusdc-basepay-per-requestjson-apino-api-keypost-method

Use cases

  • —Programmatic access to premium API services without traditional API key management
  • —Agent-driven pay-per-call workflows settled in USDC on Base
  • —Accessing data, AI, finance, or utility endpoints with micropayments

Fit

Best for

  • —Agents or developers who want keyless, pay-per-use API access
  • —Crypto-native workflows that can settle USDC on Base
  • —Low-commitment, no-subscription API consumption

Not for

  • —Users who need detailed API documentation or guaranteed SLAs before integrating
  • —High-volume use cases where per-request pricing at $0.02 may be expensive compared to bulk plans
  • —Users without access to USDC on the Base network

Quick start

# Send a POST with x402 payment header to access the endpoint
curl -X POST https://lowpaymentfee.com/api/v1/payments/347 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/payments/347
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.35/ 1.00

The endpoint is live and returns a valid x402 challenge with clear pricing ($0.02 USDC on Base). However, there is no API documentation, no request/response schema, and the /payments/347 path is not listed among the platform's advertised endpoints. All doc pages return only 'Connect wallet' stubs, making it impossible to determine what this endpoint actually does.

Warnings

  • —No API documentation available — all doc pages (/docs, /api, /pricing, /README) return only 'Connect wallet' stubs
  • —The specific endpoint /api/v1/payments/347 is not listed among the platform's advertised APIs, making its purpose unclear
  • —No request or response schema provided; behavior must be discovered empirically
  • —No OpenAPI spec or ai-plugin manifest found

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 07:08:25Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-23

Agent access

JSONhttps://clawmart.sh/api/listings/nwZLJZ
Pay-per-call premium API access on Base via x402 — $0.02/request in USDC. — Clawmart · Clawmart