x402basequality 0.30

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

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/charges/53

What it does

lowpaymentfee.com hosts a collection of pay-per-request API endpoints accessible via the x402 payment protocol on the Base network. The specific endpoint at `/api/v1/charges/53` is labeled "Premium API Access" and accepts POST requests. Payment is settled in USDC (contract 0x8335…2913 on Base) with a maximum charge of 20,000 base units, which equals $0.02 per request (USDC uses 6 decimals). No API keys, rate limits, or upfront commitments are required — callers simply attach an X-PAYMENT header with a valid x402 payment proof.

The broader lowpaymentfee.com platform advertises 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 listed endpoints share the same $0.02/request pricing.

Documentation is extremely sparse — the /docs, /pricing, /api, and /README pages all render only a "Connect wallet" prompt with no further technical detail. There is no OpenAPI spec, no request/response schema documentation, and no usage examples available from the crawled material. The endpoint is confirmed live (returns a proper 402 challenge), but the actual behavior behind the paywall and the response format for `/api/v1/charges/53` specifically cannot be verified from available information.

Capabilities

x402-paymentpay-per-requestusdc-settlementbase-networkno-api-keypost-endpoint

Use cases

  • —Programmatic access to premium API services without registration or API keys
  • —Agent-driven workflows that need on-demand paid API calls settled in USDC on Base
  • —Testing x402 payment protocol integrations with a low-cost endpoint

Fit

Best for

  • —Developers exploring x402 payment-gated APIs
  • —AI agents that can autonomously pay for API calls via crypto
  • —Users who want no-signup, no-rate-limit API access at $0.02/call

Not for

  • —Users needing detailed API documentation or guaranteed SLAs
  • —Applications requiring non-crypto payment methods
  • —High-volume use cases where per-call pricing may add up without bulk discounts

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/charges/53 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-proof>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/charges/53
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is confirmed live with a valid 402 challenge and clear pricing ($0.02 USDC on Base). However, documentation is essentially nonexistent — all doc pages show only 'Connect wallet'. There is no OpenAPI spec, no request/response schema, no examples, and the actual functionality behind '/api/v1/charges/53' is undescribed. The listing is effectively a stub.

Warnings

  • —No documentation available — /docs, /pricing, /api, and /README all render only 'Connect wallet'
  • —No OpenAPI or schema definition found for any endpoint
  • —The specific functionality of /api/v1/charges/53 ('Premium API Access') is not described anywhere in the crawled material
  • —Cannot verify what data or service is returned after payment

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 04:02:57Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-23

Agent access

JSONhttps://clawmart.sh/api/listings/SSx7GU
Pay-per-call premium API access on Base via x402 — $0.02/request in USDC. — Clawmart · Clawmart