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/70

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 suite of APIs spanning data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities — all priced at $0.02 per request, payable in USDC on the Base network.

The specific endpoint `/api/v1/payments/70` accepts POST requests and returns JSON. The x402 challenge confirms it is live, requiring a maximum of 20,000 base units of USDC (0x8335…2913 on Base, 6 decimals), which equals $0.02 per call. Payment is made via the x402 exact scheme to the payTo address. No API keys or rate limits are advertised; access is instant once payment is included in the request header.

However, the actual functionality behind this specific `/payments/70` endpoint is unclear. The site's landing page lists many categorized APIs (analytics, AI, finance, utilities), but `/api/v1/payments/70` does not appear among them. The description field in the x402 challenge simply says "Premium API Access" without further detail. Documentation pages (`/docs`, `/pricing`, `/api`, `/README`) all returned only a "Connect wallet" prompt with no substantive content. Without documentation or an OpenAPI schema, the precise input parameters and response format for this endpoint remain unknown.

Capabilities

x402-paymentusdc-basepay-per-requestjson-responsehttp-post

Use cases

  • —Accessing a premium API endpoint with per-request USDC micropayments on Base
  • —Integrating pay-as-you-go API calls into agent workflows without API keys
  • —Testing x402 payment protocol integrations against a live endpoint

Fit

Best for

  • —Developers experimenting with x402 payment-gated APIs
  • —Agents that can settle USDC payments on Base L2
  • —Use cases requiring keyless, per-call API access

Not for

  • —Users who need detailed documentation or OpenAPI specs before integrating
  • —Applications requiring free or fiat-only payment methods
  • —Production workloads where the endpoint's exact behavior must be well-documented

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/payments/70 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-header>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/payments/70
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live and returns a valid x402 challenge, confirming pricing and payment details. However, there is no OpenAPI schema, no documentation, no examples, and the actual functionality of this specific endpoint is undocumented. The docs/pricing/README pages are all empty beyond a wallet-connect prompt. This is effectively a stub listing.

Warnings

  • —The exact functionality of /api/v1/payments/70 is unknown — it does not appear in the site's listed API catalog
  • —All documentation pages (/docs, /pricing, /api, /README) returned no useful content
  • —No OpenAPI schema or request/response examples are available
  • —Input parameters and response format are entirely unspecified

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 07:24:30Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/P6Vkve
Pay-per-call premium API access on Base via x402 — $0.02/request in USDC. — Clawmart · Clawmart