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/80

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 collection 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/80` is labeled "Premium API Access" in the x402 challenge. The probe confirms it is live, returning a 402 challenge with a maxAmountRequired of 20,000 base units of USDC (USD Coin, 6 decimals), which equals $0.02. Payment is made to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` using the exact payment scheme. The endpoint accepts POST requests and returns `application/json`.

However, the actual functionality behind this specific endpoint path (`/payments/80`) is unclear. The site's landing page lists numerous categorized APIs (analytics, AI, finance, utilities) but does not specifically document a `/payments/80` route. No OpenAPI spec, detailed docs, or example request/response payloads were found in the crawl — the docs, API, pricing, and README pages all rendered only a "Connect wallet" prompt with no substantive content. As a result, the precise input parameters and response format for this endpoint remain unknown.

Capabilities

x402-paymentusdc-settlementbase-networkpay-per-requestno-api-keyjson-response

Use cases

  • —Agent-initiated pay-per-call API access without pre-registration or API keys
  • —Programmatic access to premium data or services settled in USDC on Base
  • —Testing x402 payment protocol integrations with a low-cost endpoint

Fit

Best for

  • —Developers or agents wanting zero-signup, pay-as-you-go API access
  • —x402 protocol experimentation with minimal cost ($0.02/call)
  • —Crypto-native workflows that settle payments on Base L2

Not for

  • —Users needing detailed API documentation or guaranteed SLAs
  • —Use cases requiring known, well-documented input/output schemas
  • —Anyone without USDC on the Base network

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/payments/80 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/payments/80
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live and returns a valid x402 challenge, but there is no documentation, no OpenAPI spec, no example requests or responses, and the specific functionality of /api/v1/payments/80 is undocumented. The docs pages are empty beyond a wallet-connect prompt. This is effectively a stub listing.

Warnings

  • —The specific functionality of /api/v1/payments/80 is not documented anywhere on the site
  • —No OpenAPI spec or schema available for request/response formats
  • —All documentation pages (docs, API, pricing, README) render only a 'Connect wallet' prompt with no content
  • —The endpoint path '/payments/80' does not appear in the site's listed API catalog, making its purpose unclear

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 07:18:12Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-23

Agent access

JSONhttps://clawmart.sh/api/listings/M8sxw9
Pay-per-call premium API access on Base via x402 — $0.02/request in USDC. — Clawmart · Clawmart