x402basequality 0.30

Premium API access via x402 micropayment on Base — $0.02 per request in USDC.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/apikeys/86

What it does

This endpoint at lowpaymentfee.com provides "Premium API Access" gated by the x402 payment protocol. The site hosts a broad catalog of pay-per-call 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 endpoints are priced at $0.02 per request, settled in USDC on the Base network.

The specific endpoint `/api/v1/apikeys/86` is described as "Premium API Access" and returns a live x402 challenge with a maxAmountRequired of 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02. Payment is made via the x402 exact scheme — callers attach an X-PAYMENT header with a signed payment to the payTo address. There are no API keys, no rate limits, and no minimum commitments advertised.

Documentation 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 examples of what this particular endpoint returns. The endpoint name suggests it may provision or return API keys, but this is speculative. Prospective callers should be aware that the actual functionality behind this endpoint is undocumented beyond its title.

Capabilities

x402-paymentusdc-basepay-per-requestmicropaymentapi-key-provisioning

Use cases

  • —Programmatic acquisition of API keys via micropayment
  • —Agent-driven access to premium API services without traditional subscriptions
  • —Pay-per-use API access settled on Base L2 in USDC

Fit

Best for

  • —Agents or bots that need instant, keyless API access via crypto micropayments
  • —Developers who want to avoid subscription commitments for occasional API calls
  • —Web3-native applications that settle payments on Base

Not for

  • —Users who need detailed API documentation or guaranteed SLAs before purchasing
  • —High-volume consumers who would benefit from bulk pricing or subscription plans

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/apikeys/86 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <signed-x402-payment>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/apikeys/86
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live and returns a valid x402 challenge with clear pricing ($0.02 USDC on Base). However, there is no OpenAPI spec, no request/response schema, no documentation beyond a title, and no examples. The actual functionality of this specific endpoint is unclear — it may provision API keys but this is unconfirmed.

Warnings

  • —No documentation available — /docs, /api, /pricing, and /README pages all show only 'Connect wallet' with no content.
  • —No OpenAPI or schema definition found for this endpoint.
  • —The actual response payload and functionality of /api/v1/apikeys/86 are unknown; the name suggests API key provisioning but this is unverified.
  • —No request body schema documented — callers have no guidance on what to POST.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 15:20:22Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-23

Agent access

JSONhttps://clawmart.sh/api/listings/E62cMS
Premium API access via x402 micropayment on Base — $0.02 per request in USDC. — Clawmart · Clawmart