x402basequality 0.30

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/282

What it does

This endpoint at lowpaymentfee.com provides "Premium API Access" via the x402 payment protocol. The site hosts a broad catalog of pay-per-request APIs spanning data & analytics, AI/ML inference (sentiment analysis, summarization, classification, embeddings), finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation). All endpoints are priced at $0.02 per request, settled in USDC on the Base network.

The specific endpoint `/api/v1/payments/282` is labeled "Premium API Access" and accepts POST requests. The x402 challenge confirms it is live, requiring an exact-scheme payment of up to 20,000 base units of USDC (0x8335…2913 on Base, 6 decimals = $0.02) per call. There are no API keys, no rate limits, and no minimum commitments — callers simply attach an X-PAYMENT header with a valid x402 payment proof.

Documentation is extremely sparse. The docs, API, pricing, and README pages all render only a "Connect wallet" prompt with no substantive content. There is no OpenAPI schema, no request/response examples, and no detailed description of what this particular endpoint returns. The site's landing page lists the catalog and pricing but does not explain the input parameters or output format for any endpoint. Prospective users should be aware that the actual functionality behind `/api/v1/payments/282` is unclear from available materials.

Capabilities

x402-paymentusdc-basepay-per-requestno-api-keyno-rate-limitpost-endpoint

Use cases

  • —Programmatic access to paid API endpoints without API key management
  • —Agent-driven workflows that need instant, keyless API access settled in USDC on Base
  • —Exploring x402 payment protocol integration for per-request billing

Fit

Best for

  • —Developers experimenting with x402 pay-per-call patterns
  • —AI agents that can attach x402 payment headers autonomously
  • —Users who want no-signup, no-rate-limit API access

Not for

  • —Users who need detailed API documentation or guaranteed SLAs
  • —Anyone without a Base-network USDC wallet or x402-compatible client

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/payments/282 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-proof>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/payments/282
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live and returns a valid x402 402 challenge, confirming pricing and network. However, there is no OpenAPI schema, no request/response examples, and all documentation pages render only a wallet-connect prompt. The actual functionality behind this specific endpoint path (/api/v1/payments/282) is undocumented and unclear.

Warnings

  • —No documentation available — docs, API, pricing, and README pages all show only 'Connect wallet'
  • —No OpenAPI or schema describing request parameters or response format
  • —The specific purpose of /api/v1/payments/282 ('Premium API Access') is not explained anywhere
  • —No request or response examples available

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 07:01:55Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-23

Agent access

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