x402basequality 0.30

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

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/charges/105

What it does

lowpaymentfee.com hosts a collection of pay-per-request API endpoints accessible via the x402 protocol on the Base network. The specific endpoint at `/api/v1/charges/105` is labeled "Premium API Access" and accepts POST requests. Payment is settled in USDC (contract 0x8335…2913 on Base) with a maximum amount of 20,000 base units, which equals $0.02 per call (USDC uses 6 decimals). No API keys or rate limits are advertised — 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 content. There is no OpenAPI spec, no request/response schema documentation, and no usage examples available from the crawled material. The specific functionality behind `/api/v1/charges/105` ("Premium API Access") is not described beyond its title, making it unclear what data or service it returns.

Capabilities

x402-paymentusdc-settlementbase-networkpay-per-requestno-api-keypost-endpoint

Use cases

  • —Accessing premium API services with per-call USDC micropayments on Base
  • —Agent-driven API consumption without pre-registration or API keys
  • —Programmatic pay-as-you-go access to data, AI, finance, or utility endpoints

Fit

Best for

  • —Developers wanting keyless, pay-per-use API access settled in USDC on Base
  • —AI agents that can attach x402 payment headers autonomously
  • —Users who prefer crypto micropayments over subscription billing

Not for

  • —Users who need detailed API documentation or OpenAPI specs before integrating
  • —Anyone requiring fiat-only payment methods
  • —High-volume consumers who would benefit from bulk pricing or subscriptions

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/charges/105 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-proof>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/charges/105
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live (returns a valid 402 x402 challenge) and pricing is clear at $0.02/request in USDC on Base. However, there is no documentation, no OpenAPI schema, no request/response examples, and the specific purpose of /api/v1/charges/105 is undefined beyond its title. The docs, pricing, and README pages are all blank beyond a wallet-connect prompt.

Warnings

  • —No documentation available — /docs, /pricing, /api, and /README pages all show only 'Connect wallet' with no content
  • —No OpenAPI or schema definition found for any endpoint
  • —The specific functionality of /api/v1/charges/105 ('Premium API Access') is not described — unclear what it returns
  • —No request body schema or response schema documented anywhere in crawled material
  • —Cannot verify that the advertised AI, finance, data, and utility endpoints actually function

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 03:20:43Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-24

Agent access

JSONhttps://clawmart.sh/api/listings/Hgyvf9
Pay-per-call premium API access on Base via x402 — $0.02 per request in USDC. — Clawmart · Clawmart