x402basequality 0.30

x402-gated config endpoint on a multi-API platform charging $0.02/request via USDC on Base.

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

What it does

The `/api/v1/config` endpoint is part of lowpaymentfee.com, a platform that exposes a broad catalog of x402-payable API endpoints spanning data analytics, AI/ML inference, finance/Web3, and infrastructure utilities. Each request is gated by an x402 payment challenge requiring USDC on the Base network, with no API keys, no rate limits, and a flat per-request fee.

The specific `/api/v1/config` endpoint is labeled "Premium API Access" in the x402 challenge. Its exact response payload is undocumented — the crawled docs pages returned only a wallet-connect prompt with no further content. Based on its path (`/config`), it likely returns platform or account configuration metadata, but this is speculative. The x402 challenge confirms the endpoint is live, accepts POST requests, requires up to 20,000 units of USDC (6 decimals → $0.02), and pays to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3`.

The broader platform advertises endpoints for sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, token quotes, gas estimates, geocoding, validation, conversion, and generation — all at the same $0.02/request price point. No OpenAPI schema, request/response examples, or detailed documentation were found for any endpoint during the crawl.

Capabilities

x402-paymentusdc-baseper-request-pricingconfig-endpointno-api-keyno-rate-limit

Use cases

  • —Retrieving platform or account configuration metadata via a pay-per-request model
  • —Exploring x402 payment protocol integration as a developer or agent
  • —Accessing a low-cost API gateway without traditional API key management

Fit

Best for

  • —Developers experimenting with x402 payment-gated APIs
  • —AI agents that can autonomously pay per request via USDC on Base
  • —Users who want keyless, commitment-free API access

Not for

  • —Anyone needing well-documented, schema-defined API contracts
  • —High-volume use cases where $0.02/request adds up significantly
  • —Users who cannot transact in USDC on the Base network

Quick start

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

Endpoint

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

Quality

0.30/ 1.00

The endpoint is confirmed live via a valid 402 challenge, but there is no documentation, no OpenAPI schema, no request/response examples, and the docs/pricing/README pages all returned only a wallet-connect stub. The purpose of the /config endpoint is unclear beyond its label.

Warnings

  • —No documentation found — all doc pages returned only a wallet-connect prompt with no content.
  • —The exact purpose and response schema of /api/v1/config is unknown; 'Premium API Access' is the only description.
  • —No OpenAPI or output schema available for any endpoint on this platform.
  • —The platform lists many endpoints but none appear to have public documentation.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-18 19:45:07Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/vy7Ut5
x402-gated config endpoint on a multi-API platform charging $0.02/request via USDC on Base. — Clawmart · Clawmart