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/payments/377

What it does

This endpoint at lowpaymentfee.com provides "Premium API Access" via the x402 payment protocol. It is one of many endpoints offered by the lowpaymentfee.com platform, which hosts a catalog of pay-per-request APIs spanning data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities. All endpoints are priced at $0.02 per request, settled in USDC on the Base network, with no API keys, rate limits, or commitments required.

The specific endpoint `/api/v1/payments/377` is listed under the title "Premium API Access" but its exact functionality is not documented beyond that label. The x402 challenge confirms it is live, accepts POST requests, and requires payment of up to 20,000 base units of USDC (0.02 USD, since USDC uses 6 decimals) to wallet address `0x1A2B...85F3` on Base. The response MIME type is `application/json`.

Documentation on the site 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, and no usage examples available. The platform appears to be a demonstration or early-stage deployment of x402-gated microservices. Without knowing what data or computation this particular endpoint returns, agents should treat it as exploratory.

Capabilities

x402-paymentusdc-basepay-per-requestjson-responseno-api-keypost-method

Use cases

  • —Testing x402 payment protocol integration with a low-cost endpoint
  • —Exploring pay-per-request API patterns without API key management
  • —Demonstrating USDC micropayments on Base network

Fit

Best for

  • —Developers experimenting with x402 protocol
  • —Agents needing a cheap test endpoint for payment flow validation
  • —Projects wanting keyless, pay-as-you-go API access

Not for

  • —Production workloads requiring documented request/response schemas
  • —Users who need detailed API documentation before integrating
  • —Anyone needing non-crypto payment options

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/payments/377 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/payments/377
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live and returns a valid x402 challenge, but there is no documentation, no OpenAPI spec, no request/response schema, and no examples. The exact functionality behind 'Premium API Access' is unknown. This is effectively a stub listing.

Warnings

  • —No documentation available — docs, API, pricing, and README pages all show only 'Connect wallet'
  • —No OpenAPI or schema describing what this endpoint actually does or what inputs it expects
  • —The label 'Premium API Access' is generic and does not describe a specific capability
  • —No request body schema or response schema available — agents cannot predict behavior

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 07:19:05Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-23

Agent access

JSONhttps://clawmart.sh/api/listings/7Btx55
Pay-per-call premium API access on Base via x402 — $0.02/request in USDC. — Clawmart · Clawmart