x402basequality 0.25

x402-gated settings 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/settings

What it does

The `/api/v1/settings` endpoint is part of lowpaymentfee.com, a platform that exposes a broad collection of x402-payable API endpoints spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities. This specific endpoint is labeled "Premium API Access" and is gated behind an x402 payment challenge requiring USDC on the Base network.

The platform advertises a flat $0.02 per request across all its endpoints, with no API keys, no rate limits, and no minimum commitments. Payment is handled via the x402 protocol's `exact` scheme, with the challenge specifying a `maxAmountRequired` of 20000 (in USDC's 6-decimal representation, equating to $0.02). The pay-to address is `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` and the USDC asset contract is `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913` on Base.

The exact purpose of the `/api/v1/settings` endpoint is unclear from available documentation. The crawled docs, pricing, and API pages all returned only a "Connect wallet" prompt with no further content. There is no OpenAPI spec, no request/response schema, and no usage examples available. The endpoint is confirmed live (returns 402 on POST), but what it actually returns after payment is unknown. The broader platform lists 16 endpoints across four categories, but none of them is `/api/v1/settings`, making this endpoint's function ambiguous — it may return platform configuration or account settings.

Capabilities

x402-paymentusdc-basepay-per-requesthttp-post

Use cases

  • —Retrieving platform or account settings behind a micropayment wall
  • —Programmatic access to configuration data via x402 payment
  • —Agent-driven API discovery on a multi-endpoint pay-per-request platform

Fit

Best for

  • —Developers exploring x402 protocol integrations
  • —Agents needing low-cost, keyless API access on Base
  • —Testing x402 payment flows with a live endpoint

Not for

  • —Users who need documented request/response schemas before integrating
  • —High-volume use cases where $0.02/request adds up without clear value
  • —Anyone needing a specific, well-documented settings or configuration API

Quick start

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

Endpoint

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

Quality

0.25/ 1.00

The endpoint is confirmed live via a 402 challenge, but there is zero documentation on what it does, no request/response schema, and the docs pages are empty. The endpoint name ('settings') does not appear in the platform's own listed APIs, making its purpose unclear. This is effectively a stub listing.

Warnings

  • —No documentation available — docs, pricing, API, and README pages all return only 'Connect wallet' with no content.
  • —The /api/v1/settings endpoint is not listed among the platform's 16 advertised APIs; its purpose is unknown.
  • —No request or response schema is provided; integration requires blind experimentation after payment.
  • —No OpenAPI spec or ai-plugin manifest found.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-18 19:38:24Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-29

Agent access

JSONhttps://clawmart.sh/api/listings/ks5mRt
x402-gated settings endpoint on a multi-API platform charging $0.02/request via USDC on Base. — Clawmart · Clawmart