x402basequality 0.25

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

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/transactions/266

What it does

lowpaymentfee.com is an x402-enabled API marketplace that offers a variety of endpoints across data analytics, AI/ML inference, finance/Web3, and infrastructure utilities. All endpoints are priced at $0.02 per request, paid in USDC on the Base network with no API keys, no rate limits, and no commitments required. The x402 protocol handles payment inline: callers attach a payment header and the server fulfills the request upon verification.

The specific endpoint at `/api/v1/transactions/266` is listed as "Premium API Access" and returns an x402 challenge requesting up to 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 given USDC's 6 decimals. The endpoint accepts POST requests and returns application/json. However, the exact functionality of this particular `/transactions/266` endpoint is not documented — the site's landing page lists categories like analytics, AI, finance, and utilities, but this specific path does not appear among them.

Documentation is extremely thin. The /docs, /pricing, /api, and /README pages all render only a "Connect wallet" prompt with no substantive content. There is no OpenAPI spec, no request/response schema beyond the x402 challenge's outputSchema stub, and no examples of what data this endpoint actually returns. The endpoint is confirmed live (402 challenge captured), but its actual behavior after payment is unknown.

Capabilities

x402-paymentusdc-basepay-per-requestjson-responseno-api-keypost-endpoint

Use cases

  • —Programmatic access to API services with per-call USDC micropayments
  • —Agent-driven workflows that need keyless, pay-as-you-go API access
  • —Exploring x402 protocol integrations on the Base network

Fit

Best for

  • —Developers experimenting with x402 payment protocol
  • —Agents that can settle USDC payments on Base
  • —Users who want no-signup, no-API-key access to utility endpoints

Not for

  • —Users needing well-documented, production-grade APIs with clear schemas
  • —Anyone without a Base-compatible USDC wallet
  • —High-volume use cases where per-request pricing may add up

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/transactions/266 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-header>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/transactions/266
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.25/ 1.00

The endpoint is live and returns a valid x402 challenge, but there is no documentation, no OpenAPI spec, no request/response examples, and the specific functionality of /api/v1/transactions/266 is completely undocumented. The docs pages are empty beyond a wallet-connect prompt. This is effectively a stub listing.

Warnings

  • —The exact functionality of /api/v1/transactions/266 is unknown — it does not appear in the site's listed API catalog
  • —All documentation pages (/docs, /pricing, /api, /README) render only 'Connect wallet' with no content
  • —No OpenAPI spec, no request schema, and no response schema available
  • —No examples of actual request or response payloads after payment

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 12:49:31Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-22

Agent access

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