x402basequality 0.30

Pay-per-call API platform on Base network via x402 — $0.02/request in USDC.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/transactions/113

What it does

lowpaymentfee.com is an x402-enabled API platform that offers a broad catalog of pay-per-request endpoints across data analytics, AI/ML inference, finance/Web3 data, and utility services. All endpoints are priced at $0.02 per request, payable in USDC on the Base network with no API keys, no rate limits, and no commitments required.

The specific endpoint at `/api/v1/transactions/113` is listed as "Premium API Access" and returns a 402 challenge requesting up to 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02. Payment is via the x402 exact scheme with a 300-second timeout. The platform also advertises sibling endpoints for sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, geocoding, validation, conversion, and data export — all at the same $0.02 price point.

Documentation is extremely sparse. The /docs, /pricing, /api, 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 examples of what any endpoint actually returns. The endpoint is live (402 challenge confirmed), but without documentation it is unclear what input the `/api/v1/transactions/113` endpoint expects or what data it returns.

Capabilities

x402-paymentusdc-basepay-per-requestjson-apino-api-keyno-rate-limit

Use cases

  • —Accessing premium API data with per-request USDC micropayments on Base
  • —Agent-driven workflows that need keyless, pay-as-you-go API access
  • —Programmatic access to transaction or financial data without subscriptions

Fit

Best for

  • —Developers who want zero-commitment, pay-per-call API access
  • —AI agents with x402-compatible wallets on Base
  • —Users who prefer crypto micropayments over API key management

Not for

  • —Users who need detailed API documentation or OpenAPI specs before integrating
  • —High-volume consumers who need bulk pricing or rate-limit guarantees
  • —Developers who cannot transact in USDC on the Base network

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/transactions/113 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-header>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/transactions/113
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live and returns a valid x402 402 challenge, confirming pricing and payment details. However, documentation is effectively nonexistent — all doc pages show only 'Connect wallet' with no schema, examples, or description of what the endpoint does. The endpoint path '/api/v1/transactions/113' with description 'Premium API Access' is too vague to determine actual functionality.

Warnings

  • —No API documentation available — /docs, /pricing, /api, and /README all render only 'Connect wallet'
  • —No OpenAPI spec or request/response schema provided
  • —The purpose of /api/v1/transactions/113 ('Premium API Access') is unclear — no description of inputs or outputs
  • —The broad catalog of advertised endpoints (AI, analytics, finance, utils) cannot be verified for actual functionality

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 12:05:43Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-23

Agent access

JSONhttps://clawmart.sh/api/listings/34yLyE
Pay-per-call API platform on Base network via x402 — $0.02/request in USDC. — Clawmart · Clawmart