x402basequality 0.30

Pay-per-call API platform on Base network via x402 — $0.02/request in USDC.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/transactions/203

What it does

lowpaymentfee.com is a pay-per-request API platform that uses the x402 protocol to accept USDC payments on the Base network. The specific endpoint `/api/v1/transactions/203` is listed as "Premium API Access" and returns a 402 challenge requiring payment of up to 20,000 base units of USDC (i.e., $0.02) per call. No API keys or rate limits are required; callers simply attach an X-PAYMENT header with a valid x402 payment proof.

The broader platform advertises multiple API categories including 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.

However, the specific functionality behind `/api/v1/transactions/203` is not documented beyond the label "Premium API Access." The crawled docs, pricing, and README pages all returned only a "Connect wallet" prompt with no additional technical documentation, schemas, or example payloads. Without paying and calling the endpoint, the actual response format and data returned remain unknown.

Capabilities

x402-paymentusdc-base-networkpay-per-requestno-api-keyhttp-post

Use cases

  • —Accessing premium API data with per-request USDC micropayments on Base
  • —Agent-driven workflows that need keyless, pay-as-you-go API access
  • —Programmatic transaction data retrieval without subscription commitments

Fit

Best for

  • —Developers who want zero-commitment, per-call API pricing
  • —AI agents with x402-compatible payment capabilities
  • —Users already holding USDC on Base network

Not for

  • —Users who need detailed API documentation or response schemas before purchasing
  • —High-volume consumers who would benefit from bulk/subscription pricing
  • —Developers without USDC on the Base network

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/transactions/203 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-proof>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/transactions/203
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live and returns a valid x402 402 challenge, confirming pricing and payment details. However, there is no documentation, no OpenAPI schema, no example requests or responses, and the actual functionality behind 'Premium API Access' at /api/v1/transactions/203 is completely opaque. All doc pages returned only 'Connect wallet' with no content.

Warnings

  • —No documentation available — all doc/pricing/README pages return only 'Connect wallet' with no technical content
  • —The specific functionality of /api/v1/transactions/203 ('Premium API Access') is undocumented; it is unclear what data or service it provides
  • —No OpenAPI spec, input schema, or output schema is available
  • —No example requests or responses can be constructed without more information

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 12:32:35Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-23

Agent access

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