x402basequality 0.30

Pay-per-call API platform on Base (USDC) offering data, AI, finance, and utility endpoints at $0.02/request.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/messages/157

What it does

lowpaymentfee.com is an x402-enabled API platform that provides a broad catalog of pay-per-request endpoints across four categories: Data & Analytics (metrics, reports, data export, insights), AI & Machine Learning (sentiment analysis, text summarization, classification, embeddings), Finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and Infrastructure utilities (geocoding, validation, conversion, generation). All endpoints are priced at $0.02 per request, settled in USDC on the Base network via the x402 protocol.

The specific endpoint at `/api/v1/messages/157` is listed as "Premium API Access" with a maximum charge of 20,000 base units of USDC (i.e., $0.02 given USDC's 6 decimals). It accepts HTTP POST requests and returns application/json. No API keys or rate limits are advertised — callers simply attach an x402 payment header to each request. The platform requires no sign-up, minimums, or commitments.

Documentation is minimal: the landing page lists available endpoints and pricing, but the /api, /pricing, and /README pages all resolve to a wallet-connect stub with no further detail. There is no OpenAPI spec, no request/response schema documentation, and no usage examples. The purpose of the `/api/v1/messages/157` endpoint specifically is unclear — the generic "Premium API Access" label does not describe what data or functionality it provides. Prospective callers should be aware that the actual behavior of this endpoint is undocumented.

Capabilities

x402-paymentusdc-basepay-per-requesthttp-postjson-responseno-api-keyno-rate-limit

Use cases

  • —Accessing pay-per-request data, AI, finance, or utility APIs without API key registration
  • —Making micropayment-gated API calls settled on Base L2 in USDC
  • —Integrating x402-compatible agent workflows that need on-demand endpoint access

Fit

Best for

  • —Developers or agents wanting zero-signup, pay-as-you-go API access
  • —x402-native agent pipelines that settle payments in USDC on Base
  • —Low-volume or experimental use cases where $0.02/call is acceptable

Not for

  • —Users needing detailed API documentation or guaranteed SLAs
  • —High-volume production workloads where per-call crypto settlement adds overhead
  • —Anyone without a Base-compatible USDC wallet

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/messages/157 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>" \
  -d '{}'

Endpoint

URLhttps://lowpaymentfee.com/api/v1/messages/157
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live (402 challenge captured) and pricing is clear ($0.02 USDC on Base), but there is no documentation, no OpenAPI spec, no request/response schema, and the purpose of /api/v1/messages/157 is entirely unclear. The landing page lists many endpoints but provides no usage details for any of them.

Warnings

  • —The specific endpoint /api/v1/messages/157 has no documented purpose — 'Premium API Access' is a generic label with no description of what it returns.
  • —No OpenAPI spec, no request schema, and no response schema are available.
  • —The /api, /pricing, and /README pages all resolve to a wallet-connect stub with no content.
  • —Without example requests or responses, callers cannot know what payload to send or what to expect back.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-21 23:09:23Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-21
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/kNHNCq
Pay-per-call API platform on Base (USDC) offering data, AI, finance, and utility endpoints at $0.02/request. — Clawmart · Clawmart