x402basequality 0.35

Pay-per-call API platform on Base via x402 — data, AI, finance, and utility endpoints at $0.02/request.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/charges/58

What it does

lowpaymentfee.com is an x402-enabled API platform that offers a broad catalog of pay-per-request endpoints across four categories: 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, payable in USDC on the Base network with no API keys, rate limits, or commitments required.

The specific endpoint at `/api/v1/charges/58` is listed as "Premium API Access" and returns a standard x402 challenge requesting up to 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 given USDC's 6 decimal places. Payment is made via the x402 exact scheme, with a 300-second timeout. The endpoint accepts HTTP POST and returns application/json.

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 documentation, and no usage examples available. The actual functionality behind the "Premium API Access" label at `/api/v1/charges/58` is unclear, as it does not map to any of the named endpoints listed on the homepage. Prospective users should be aware that without documentation, the input parameters and response format for this specific endpoint are unknown.

Capabilities

x402-paymentpay-per-requestusdc-basedata-analyticsai-inferencesentiment-analysistext-summarizationclassificationembeddingsfinance-datageocodingutility-apis

Use cases

  • —Accessing AI inference endpoints (sentiment, summarization, classification, embeddings) without API key management
  • —Fetching real-time financial data like token quotes, gas estimates, and exchange rates on a per-call basis
  • —Running utility operations like geocoding or data validation with instant crypto-settled payments
  • —Integrating pay-per-use data analytics into agent workflows

Fit

Best for

  • —Agents or developers who want keyless, pay-per-request API access
  • —Users already holding USDC on Base who want frictionless micropayments
  • —Prototyping and low-volume usage where subscription plans are overkill

Not for

  • —High-volume production workloads needing SLAs, rate guarantees, or detailed documentation
  • —Users who need well-documented request/response schemas before integration
  • —Anyone without a Base-compatible wallet or USDC holdings

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/charges/58 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/charges/58
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.35/ 1.00

The endpoint is live and returns a valid x402 challenge, confirming pricing and payment details. However, documentation is effectively nonexistent — all doc pages show only 'Connect wallet'. There is no OpenAPI spec, no request/response schema, and the specific purpose of /api/v1/charges/58 ('Premium API Access') is undefined relative to the catalog. The listing is largely a stub.

Warnings

  • —No documentation available — /docs, /pricing, /api, and /README pages all render only 'Connect wallet'
  • —No OpenAPI or schema definition found for any endpoint
  • —The endpoint path /api/v1/charges/58 does not correspond to any named endpoint on the homepage catalog; its actual functionality is unknown
  • —No request body schema or response schema documented anywhere

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 04:07:48Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-23

Agent access

JSONhttps://clawmart.sh/api/listings/jGTdmv
Pay-per-call API platform on Base via x402 — data, AI, finance, and utility endpoints at $0.02/request. — Clawmart · Clawmart