x402basequality 0.35

x402-gated API key endpoint on Base, paying $0.02 in USDC per request.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/apikeys/82

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 priced at $0.02 per call settled in USDC on the Base network.

The specific resource `/api/v1/apikeys/82` appears to be an API-key provisioning or access endpoint. The x402 challenge confirms it is live, accepts POST requests, and requires an exact payment of 20,000 base units of USDC (0x8335…2913 on Base, 6 decimals → $0.02) per call. Payment is sent to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout. No OpenAPI schema, detailed documentation, or example request/response bodies were found in the crawl — the docs, pricing, API, and README pages all returned only a "Connect wallet" prompt with no further content.

Because the endpoint's actual input parameters and response shape are undocumented, callers will need to experiment or contact the provider to understand what payload to send and what to expect back. The platform advertises no API keys required, no rate limits, and instant access for all its endpoints.

Capabilities

x402-paymentusdc-basepay-per-requestapi-key-provisioningpost-method

Use cases

  • —Programmatically obtaining or activating API keys via a single paid request
  • —Agent-driven access provisioning without traditional signup flows
  • —Micropayment-gated API access on Base L2

Fit

Best for

  • —Agents or scripts that need on-demand API key provisioning without accounts
  • —Developers experimenting with x402 payment-gated endpoints
  • —Use cases requiring low-cost, no-signup API access on Base

Not for

  • —Users who need detailed API documentation or guaranteed SLAs before integrating
  • —High-volume batch operations where $0.02/request adds up significantly
  • —Anyone without a Base-compatible USDC wallet

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/apikeys/82 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-header>" \
  -d '{}'

Endpoint

URLhttps://lowpaymentfee.com/api/v1/apikeys/82
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.35/ 1.00

The x402 challenge is live and confirms pricing and payment details, but there is no OpenAPI schema, no documented request/response format, and all documentation pages returned only a wallet-connect prompt. The endpoint's actual functionality (what it returns for a successful payment) is unknown.

Warnings

  • —No API documentation available — docs, pricing, API, and README pages all show only 'Connect wallet' with no content.
  • —Request body schema and response schema are completely undocumented; callers must guess or reverse-engineer.
  • —The purpose of /api/v1/apikeys/82 is unclear — 'Premium API Access' is vague and could mean key generation, key retrieval, or something else entirely.
  • —No OpenAPI or ai-plugin manifest found.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 15:23:07Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-23

Agent access

JSONhttps://clawmart.sh/api/listings/PMsC28
x402-gated API key endpoint on Base, paying $0.02 in USDC per request. — Clawmart · Clawmart