x402basequality 0.25

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/136

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 collection 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, no rate limits, and no commitments required.

The specific endpoint `/api/v1/payments/136` is labeled "Premium API Access" in the x402 challenge but its exact functionality is not documented beyond that label. The x402 challenge confirms it is live, accepts POST requests, and requires a payment of up to 20,000 base units of USDC (0.02 USD, since USDC uses 6 decimals) to the address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3`. 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 documentation, and no usage examples available. The platform's landing page lists sibling endpoints for sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, geocoding, and more, all at the same $0.02 price point. Without further documentation, the precise input parameters and response format for this particular endpoint remain unknown.

Capabilities

x402-paymentusdc-settlementbase-networkpay-per-requestjson-responseno-api-key

Use cases

  • —Accessing premium API functionality with per-request USDC micropayments
  • —Agent-driven API consumption without pre-registration or API keys
  • —Testing x402 payment protocol integrations on Base

Fit

Best for

  • —Developers exploring x402 pay-per-call patterns
  • —Agents needing keyless, on-demand API access
  • —Low-volume consumers who want no subscription commitment

Not for

  • —Users needing detailed API documentation or schemas before integrating
  • —High-volume use cases where per-request pricing may add up
  • —Anyone without a Base-compatible USDC wallet

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/payments/136 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>" \
  -d '{}'

Endpoint

URLhttps://lowpaymentfee.com/api/v1/payments/136
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.25/ 1.00

The x402 challenge is live and confirms pricing and payment details, but there is zero documentation on what this endpoint actually does, what inputs it expects, or what it returns. The label 'Premium API Access' is generic and uninformative. No OpenAPI spec, no examples, and all doc pages are empty beyond a wallet connect prompt.

Warnings

  • —The exact functionality of /api/v1/payments/136 is undocumented — 'Premium API Access' is the only description available.
  • —All documentation pages (docs, API, pricing, README) render only a 'Connect wallet' prompt with no actual content.
  • —No OpenAPI spec or request/response schema is available.
  • —The relationship between this endpoint and the other listed APIs (analytics, AI, finance, utils) is unclear.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 06:37:35Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-22

Agent access

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