x402basequality 0.30

x402-gated premium API endpoint on Base, pay-per-call with USDC at $0.02/request.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/benefits/57

What it does

This endpoint at `/api/v1/benefits/57` is part of the lowpaymentfee.com platform, which offers a collection of x402-protocol pay-per-request APIs spanning data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities. The endpoint is labeled "Premium API Access" but its specific functionality is not documented beyond that label. It is one of many endpoints on the platform, all priced uniformly at $0.02 per request.

Payment is handled via the x402 protocol on the Base network using USDC (contract `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`). The max amount required is 20,000 base units of USDC (6 decimals), which equals $0.02 USD. No API keys are needed; callers authenticate by attaching an `X-PAYMENT` header with a valid x402 payment proof. The endpoint accepts HTTP POST requests and returns `application/json`.

The platform advertises no rate limits, no minimums, and instant access. However, documentation is extremely sparse — the docs, pricing, API, and README pages all render only a "Connect wallet" prompt with no further content. The specific input schema, expected request body, and response format for this particular endpoint (`/api/v1/benefits/57`) are entirely undocumented, making it difficult to use without experimentation.

Capabilities

x402-paymentusdc-basepay-per-requestjson-responsehttp-post

Use cases

  • —Accessing premium data or services via a single micropayment per request
  • —Agent-driven API consumption without API key management
  • —Testing x402 payment flows on Base network

Fit

Best for

  • —Developers exploring x402 pay-per-request patterns
  • —AI agents that can settle USDC payments on Base
  • —Users who want keyless, commitment-free API access

Not for

  • —Anyone needing well-documented API contracts with clear input/output schemas
  • —High-volume use cases where per-request pricing may add up without bulk discounts
  • —Users who cannot transact in USDC on the Base network

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/benefits/57 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-proof>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/benefits/57
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live and returns a valid x402 challenge, confirming pricing and payment details. However, the specific functionality of /api/v1/benefits/57 is completely undocumented — no input schema, no output schema, no examples, and all documentation pages render only 'Connect wallet'. The listing is effectively a stub.

Warnings

  • —The specific purpose and functionality of /api/v1/benefits/57 ('Premium API Access') is not documented anywhere in the crawled material.
  • —All documentation pages (docs, pricing, API, README) return only a 'Connect wallet' prompt with no usable content.
  • —No input or output schema is available; callers must experiment to discover what this endpoint does.
  • —The endpoint path '/api/v1/benefits/57' does not appear in the site's own API listing, suggesting it may be unlisted or deprecated.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 16:30:24Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/XYzzD7
x402-gated premium API endpoint on Base, pay-per-call with USDC at $0.02/request. — Clawmart · Clawmart