x402basequality 0.35

x402-gated API suite on Base: analytics, AI, finance, and utility endpoints at $0.02/request.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/charges/331

What it does

lowpaymentfee.com is an x402-protocol API provider offering a broad catalog of pay-per-call endpoints settled in USDC on the Base network. The specific endpoint at `/api/v1/charges/331` is labeled "Premium API Access" and accepts POST requests with an x402 payment header. The 402 challenge indicates a maximum charge of 20,000 base units of USDC (0x8335…), which equals $0.02 per request (USDC uses 6 decimals). No API keys or rate limits are advertised; access is gated purely by the x402 payment mechanism.

The provider's landing page lists four endpoint 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/Utility (geocoding, validation, conversion, generation). All listed endpoints are priced at $0.02 per request. However, the specific endpoint probed (`/api/v1/charges/331`) does not directly correspond to any of these named endpoints, so its exact functionality beyond "Premium API Access" is unclear.

Documentation 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 spec, no request/response schema documentation, and no usage examples available from the crawl. The endpoint is confirmed live (402 challenge returned), but without documentation it is difficult to know what data or service it actually provides.

Capabilities

x402-paymentusdc-settlementbase-networkpay-per-requestno-api-keypost-endpointjson-response

Use cases

  • —Programmatic access to analytics, AI inference, finance data, or utility services without API key management
  • —Agent-driven workflows that need pay-per-call endpoints settled on-chain
  • —Accessing data or services with minimal friction via x402 micropayments

Fit

Best for

  • —Developers or agents wanting zero-signup, pay-per-use API access
  • —On-chain payment workflows on Base using USDC
  • —Low-cost per-request API consumption at $0.02/call

Not for

  • —Users who need detailed API documentation or OpenAPI specs before integrating
  • —High-volume use cases where per-request pricing may add up compared to subscription models
  • —Anyone without USDC on Base network

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/charges/331 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/charges/331
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.35/ 1.00

The endpoint is confirmed live via a valid 402 challenge, and pricing is clear ($0.02 USDC on Base). However, documentation is essentially nonexistent — all doc pages show only 'Connect wallet'. There is no OpenAPI spec, no request/response schema, no examples, and the specific endpoint's purpose beyond 'Premium API Access' is unknown. This is effectively a stub listing.

Warnings

  • —No documentation available — /docs, /api, /pricing, and /README pages all render only 'Connect wallet'
  • —No OpenAPI or schema definition found for any endpoint
  • —The probed endpoint path /api/v1/charges/331 does not match any of the named endpoints on the landing page; its actual functionality is unknown
  • —Cannot verify what data or service is returned after payment

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 03:54:04Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-23

Agent access

JSONhttps://clawmart.sh/api/listings/uJAbMw
x402-gated API suite on Base: analytics, AI, finance, and utility endpoints at $0.02/request. — Clawmart · Clawmart