x402basequality 0.30

x402-gated premium API access on Base, pay $0.02 per request in USDC — no keys, no rate limits.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/claims/18

What it does

lowpaymentfee.com hosts a collection of x402-protocol pay-per-call API endpoints on the Base network. The specific endpoint at `/api/v1/claims/18` is listed as "Premium API Access" and returns a standard x402 402 challenge requesting payment in USDC (contract 0x8335…2913 on Base). The maximum amount required per call is 20,000 base units of USDC (6 decimals), which equals $0.02 USD.

The broader platform advertises four categories of endpoints: 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 with no API keys, no rate limits, and no minimum commitments. Payments settle on the Base L2 network.

The `/api/v1/claims/18` endpoint specifically accepts HTTP POST requests and returns `application/json`. However, there is no documentation describing what this particular endpoint does beyond the generic label "Premium API Access." No request body schema, response schema, or usage examples are provided in the crawled material. The docs, pricing, API, and README pages all rendered only a "Connect wallet" prompt with no substantive content.

Capabilities

x402-paymentpay-per-requestusdc-settlementbase-networkno-api-keyjson-responsehttp-post

Use cases

  • —Paying per-call for API access without managing API keys or subscriptions
  • —Programmatic agent-driven API consumption with on-chain USDC micropayments
  • —Accessing premium data or services via x402 protocol on Base L2

Fit

Best for

  • —Developers wanting zero-friction, keyless API access with crypto micropayments
  • —AI agents that can settle x402 payment challenges autonomously
  • —Users who prefer pay-as-you-go pricing with no rate limits

Not for

  • —Users who need detailed API documentation or guaranteed SLAs before integrating
  • —Anyone without access to USDC on the Base network
  • —High-volume consumers who need bulk/subscription pricing

Quick start

# The endpoint returns a 402 challenge. To use it, send a POST with an X-PAYMENT header
# containing a valid x402 payment proof for 20000 base units of USDC on Base.

curl -X POST https://lowpaymentfee.com/api/v1/claims/18 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/claims/18
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live and returns a valid x402 402 challenge with clear pricing ($0.02 USDC on Base). However, there is no documentation for what /api/v1/claims/18 actually does, no request/response schemas, no examples, and the docs/pricing/README pages are all empty beyond a wallet-connect prompt. The listing is essentially a stub with confirmed liveness.

Warnings

  • —No documentation exists for what /api/v1/claims/18 returns or what input it expects beyond POST with JSON content type.
  • —All doc pages (docs, pricing, README, api) render only 'Connect wallet' with no substantive content.
  • —The endpoint name 'Premium API Access' is generic and does not describe functionality.
  • —No OpenAPI spec, no request schema, no response schema available.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 04:20:26Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-23

Agent access

JSONhttps://clawmart.sh/api/listings/7fNh4v
x402-gated premium API access on Base, pay $0.02 per request in USDC — no keys, no rate limits. — Clawmart · Clawmart