x402basequality 0.30

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/8

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

The specific endpoint `/api/v1/apikeys/8` 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…0913 on Base, 6 decimals → $0.02) per call. Payment is sent to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a maximum timeout of 300 seconds.

Documentation is extremely sparse — the docs, pricing, API, and README pages all render only a "Connect wallet" prompt with no further content. There is no OpenAPI spec, no request/response schema, and no usage examples available from the crawl. The platform advertises no API keys required, no rate limits, and instant access, but the actual behavior and response format of this particular endpoint remain undocumented.

Capabilities

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

Use cases

  • —Programmatically obtaining or managing API keys via a single paid request
  • —Integrating pay-per-call API access into agent workflows without pre-registration
  • —Demonstrating x402 payment protocol usage on Base

Fit

Best for

  • —Agents needing on-demand API key provisioning without signup
  • —Developers experimenting with x402 micropayment-gated endpoints
  • —Use cases requiring no-commitment, pay-as-you-go API access

Not for

  • —Users needing detailed API documentation or guaranteed SLAs
  • —High-volume use cases where $0.02/request adds up significantly
  • —Anyone requiring non-crypto payment methods

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/apikeys/8 \
  -H "X-PAYMENT: <x402-payment-header>" \
  -H "Content-Type: application/json"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/apikeys/8
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live and returns a valid x402 challenge with clear pricing, but there is no documentation, no OpenAPI spec, no request/response schema, and no examples. The docs pages are empty beyond a wallet-connect prompt. The purpose of this specific endpoint (apikeys/8) is unclear beyond its title.

Warnings

  • —No OpenAPI spec or request/response schema available
  • —All documentation pages (docs, pricing, API, README) render only 'Connect wallet' with no content
  • —The exact purpose and expected input/output of /api/v1/apikeys/8 is undocumented
  • —No information on what 'Premium API Access' actually returns

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 15:17:09Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-23

Agent access

JSONhttps://clawmart.sh/api/listings/gNqYkA