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/187

What it does

This endpoint at lowpaymentfee.com provides "Premium API Access" via the x402 payment protocol. It is one of many endpoints offered by the lowpaymentfee.com platform, which hosts a catalog of pay-per-request APIs spanning data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities. All endpoints are priced at $0.02 per request, settled in USDC on the Base network, with no API keys, no rate limits, and no commitments required.

The specific endpoint `/api/v1/payments/187` is labeled "Premium API Access" in the x402 challenge but its exact functionality is not documented beyond that label. The x402 challenge confirms it is live, accepts POST requests, and requires a payment of up to 20,000 base units of USDC (0.02 USD, since USDC uses 6 decimals) to the address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3`. The response MIME type is `application/json`.

Documentation on the site is extremely sparse — the docs, API, pricing, and README pages all render only a "Connect wallet" prompt with no further content. There is no OpenAPI schema, no request/response examples, and no detailed description of what this particular endpoint returns. The platform's landing page lists sibling endpoints for analytics, AI inference, finance data, and utilities, all at the same $0.02 price point, but the `/api/v1/payments/187` endpoint does not appear in that catalog. Users should be aware that the actual behavior of this endpoint is unclear from available documentation.

Capabilities

x402-paymentusdc-base-networkpay-per-requestjson-responseno-api-keypost-method

Use cases

  • —Accessing a premium API resource with per-call USDC micropayments on Base
  • —Demonstrating x402 payment protocol integration for agent-purchasable endpoints
  • —Testing low-cost pay-per-request API patterns without API key management

Fit

Best for

  • —Developers exploring x402 payment protocol integrations
  • —Agents needing keyless, pay-per-call API access on Base
  • —Users wanting low-friction micropayment-gated endpoints

Not for

  • —Users who need detailed API documentation or guaranteed SLAs
  • —Applications requiring free or subscription-based access patterns
  • —Use cases needing high-throughput batch processing (no documented rate limits but no guarantees either)

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/payments/187 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/payments/187
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, there is no documentation, no OpenAPI schema, no request/response examples, and the specific functionality of /api/v1/payments/187 is entirely undocumented. The docs pages are empty beyond a wallet connect prompt. This is effectively a stub listing.

Warnings

  • —The exact functionality of /api/v1/payments/187 is not documented — 'Premium API Access' is the only label provided.
  • —No OpenAPI schema, request format, or response examples are available.
  • —All documentation pages (docs, API, pricing, README) render only 'Connect wallet' with no content.
  • —This endpoint does not appear in the platform's own catalog of available APIs on the landing page.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 06:47:14Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-22

Agent access

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