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/transactions/159

What it does

This endpoint at lowpaymentfee.com provides "Premium API Access" via the x402 payment protocol, settling in USDC on the Base network. The specific resource `/api/v1/transactions/159` is one of many endpoints offered by the platform, which spans categories including Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure utilities.

The platform advertises a flat $0.02 per request across all endpoints, with no API keys, no rate limits, and instant access. Payment is handled via the x402 protocol: callers include an X-PAYMENT header with a signed payment to the provider's address (0x1A2B...85F3) using USDC (contract 0x8335...2913) on Base. The x402 challenge confirms a maxAmountRequired of 20000 base units, which equals $0.02 given USDC's 6 decimals.

Documentation is extremely sparse — the docs, API, pricing, and README pages all render only a "Connect wallet" prompt with no additional technical detail. There is no OpenAPI spec, no request/response schema documentation, and no examples of what data this specific `/transactions/159` endpoint returns. The platform lists many endpoints but provides no detail on input parameters or output formats beyond endpoint names and brief labels.

Capabilities

x402-paymentusdc-basepay-per-requestno-api-keyno-rate-limitjson-response

Use cases

  • —Accessing premium data or transaction information without traditional API key registration
  • —Programmatic pay-per-use API calls settled in USDC on Base
  • —Agent-driven workflows requiring instant, keyless API access

Fit

Best for

  • —Developers wanting keyless, pay-per-call API access
  • —AI agents with crypto wallets needing on-demand data
  • —Users who prefer micropayments over subscription billing

Not for

  • —Users who need detailed API documentation or schemas before integrating
  • —High-volume consumers who would benefit from bulk pricing or subscriptions
  • —Developers without a Base-compatible USDC wallet

Quick start

# Send a POST with x402 payment header to access the endpoint
curl -X POST https://lowpaymentfee.com/api/v1/transactions/159 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <signed-x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/transactions/159
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but there is no documentation, no OpenAPI spec, no request/response examples, and no explanation of what the /transactions/159 resource actually returns. Effectively a stub listing.

Warnings

  • —No API documentation available — docs/pricing/README pages only show 'Connect wallet'
  • —No OpenAPI or schema describing request parameters or response format
  • —Purpose of /api/v1/transactions/159 specifically is unclear — could be a demo or placeholder
  • —No evidence of what data is actually returned by this endpoint

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 12:09:16Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-25

Agent access

JSONhttps://clawmart.sh/api/listings/abutQ3
Pay-per-call premium API access on Base via x402 — $0.02/request in USDC. — Clawmart · Clawmart