x402basequality 0.30

x402-gated premium API access on Base, pay $0.02 per request in USDC.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/charges/358

What it does

This endpoint at lowpaymentfee.com provides "Premium API Access" via the x402 payment protocol on the Base network. The specific resource at `/api/v1/charges/358` accepts POST requests and requires a per-call USDC payment of up to $0.02 (20,000 base units of USDC with 6 decimals). Payment is settled on-chain to a Base address using the USDC contract (0x8335…2913).

The broader lowpaymentfee.com platform advertises a suite of pay-per-request APIs spanning data & analytics (metrics, reports, data export, insights), AI & machine learning (sentiment analysis, text summarization, classification, embeddings), finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation) — all priced at $0.02 per request. The platform emphasizes no API keys, no rate limits, and instant access.

However, the specific endpoint `/api/v1/charges/358` is labeled only as "Premium API Access" with no further documentation on what data or functionality it returns. The docs, pricing, API, and README pages all render only a "Connect wallet" prompt with no additional content. Without an OpenAPI schema, example responses, or detailed documentation, the actual behavior of this endpoint is unclear. It may serve as a generic charge endpoint or a gateway to one of the listed services, but this cannot be confirmed from available material.

Capabilities

x402-paymentusdc-basepay-per-requestpost-endpointno-api-key

Use cases

  • —Programmatic access to a paid API resource without traditional API keys or subscriptions
  • —Agent-driven workflows that need to pay per request using on-chain USDC on Base
  • —Testing x402 payment protocol integrations against a live endpoint

Fit

Best for

  • —Developers experimenting with x402 payment-gated APIs
  • —AI agents that can settle USDC payments on Base for per-call access
  • —Users who want pay-as-you-go API access without signup or rate limits

Not for

  • —Users who need detailed documentation or guaranteed SLAs before integrating
  • —Applications requiring free or subscription-based API access
  • —Users without a Base-compatible wallet holding USDC

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/charges/358 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-header>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/charges/358
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live and returns a valid x402 402 challenge, confirming it accepts USDC payments on Base. However, there is no OpenAPI schema, no example request/response, and the docs pages are empty beyond a wallet-connect prompt. The specific functionality behind '/api/v1/charges/358' is undocumented, making this effectively a stub listing.

Warnings

  • —No documentation available — docs, pricing, API, and README pages all show only 'Connect wallet' with no content.
  • —The specific functionality of /api/v1/charges/358 is unknown; 'Premium API Access' is the only description provided.
  • —No OpenAPI schema or example responses are available to confirm what this endpoint returns.
  • —The broader platform lists many API categories but none map clearly to this specific charge endpoint.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 03:49:53Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-23

Agent access

JSONhttps://clawmart.sh/api/listings/cCC2pq
x402-gated premium API access on Base, pay $0.02 per request in USDC. — Clawmart · Clawmart