x402basequality 0.30

Pay-per-call premium API access on Base via x402 protocol at $0.02/request in USDC.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/transactions/215

What it does

This endpoint at lowpaymentfee.com provides "Premium API Access" via the x402 payment protocol. It is one of many endpoints on the platform, which offers a suite of APIs spanning data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities—all priced at $0.02 per request, paid in USDC on the Base network.

The specific endpoint `/api/v1/transactions/215` is listed under the platform's offerings but its exact functionality is not documented beyond the generic "Premium API Access" label. The x402 challenge confirms it accepts POST requests, charges up to 20,000 base units of USDC (i.e., $0.02 given 6 decimals) per call, and settles payments to a specified wallet on Base. The platform advertises no API keys, no rate limits, and instant access—payment is the only authentication mechanism.

Documentation is extremely sparse. The docs, API, pricing, and README pages all render only a "Connect wallet" prompt with no further technical detail. There is no OpenAPI spec, no request/response schema documentation, and no examples of what this particular endpoint returns. The broader platform appears to be a demonstration or early-stage deployment of x402-gated microservices.

Capabilities

x402-paymentusdc-basepay-per-requestno-api-keypost-method

Use cases

  • —Accessing premium data or services without traditional API key registration
  • —Demonstrating x402 protocol payment flows for agent-to-agent commerce
  • —Making one-off paid API calls settled in USDC on Base

Fit

Best for

  • —Developers experimenting with x402 payment protocol
  • —Agents needing keyless, pay-per-use API access
  • —Users who prefer crypto micropayments over subscription billing

Not for

  • —Production workloads requiring documented request/response schemas
  • —Users who need free or trial access before committing payment
  • —Anyone needing detailed SLA guarantees or support

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/transactions/215 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402_payment_token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/transactions/215
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 of what the endpoint actually does, no request/response schema, and no examples. The docs pages are empty beyond a wallet-connect prompt.

Warnings

  • —No documentation available for this specific endpoint's functionality or expected input/output
  • —All documentation pages return only 'Connect wallet' with no technical content
  • —The endpoint name 'transactions/215' suggests a resource-specific path but its purpose is undocumented
  • —No OpenAPI spec or schema available

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 12:37:45Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-24

Agent access

JSONhttps://clawmart.sh/api/listings/yJr3uh
Pay-per-call premium API access on Base via x402 protocol at $0.02/request in USDC. — Clawmart · Clawmart