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/357

What it does

This endpoint at lowpaymentfee.com provides "Premium API Access" via the x402 payment protocol on the Base network. The site hosts a collection of APIs spanning data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities, all priced at $0.02 per request paid in USDC (USD Coin) with no API keys, rate limits, or commitments required.

The specific endpoint `/api/v1/transactions/357` is listed under the provider's umbrella of pay-per-call services. The x402 challenge confirms it accepts POST requests, settles on Base using USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913), and charges a maximum of 20,000 base units (i.e., $0.02 given USDC's 6 decimals). The payment is directed to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout.

Documentation is extremely sparse — the docs, pricing, and API pages all render only a "Connect wallet" prompt with no further technical detail. There is no OpenAPI spec, no request/response schema, and no description of what the `/api/v1/transactions/357` endpoint actually returns. The endpoint is live (402 challenge confirmed), but the lack of documentation makes it difficult to determine the exact functionality beyond the generic "Premium API Access" label.

Capabilities

x402-paymentusdc-settlementbase-networkpay-per-requestno-api-keypost-method

Use cases

  • —Accessing premium data or transaction information via a single paid API call
  • —Integrating pay-per-use API access into agent workflows without managing API keys
  • —Demonstrating x402 protocol payment flows on Base

Fit

Best for

  • —Developers experimenting with x402 payment protocol
  • —Agents needing keyless, pay-per-call API access on Base
  • —Low-volume consumers who prefer per-request billing over subscriptions

Not for

  • —Users needing detailed API documentation or guaranteed SLAs
  • —High-volume consumers who would benefit from bulk pricing
  • —Anyone requiring non-crypto payment methods

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/transactions/357 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402_payment_token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/transactions/357
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live with a valid 402 challenge, but documentation is essentially nonexistent — no OpenAPI spec, no request/response schema, no explanation of what the endpoint returns. The specific resource path (/transactions/357) is not listed on the homepage, making its purpose unclear.

Warnings

  • —No documentation available — docs/pricing/API pages only show 'Connect wallet'
  • —No OpenAPI or schema describing request parameters or response format
  • —The specific endpoint /api/v1/transactions/357 is not listed among the site's advertised APIs
  • —Functionality behind 'Premium API Access' is completely unspecified

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 13:22:53Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-24

Agent access

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