x402basequality 0.35

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

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/claims/39

What it does

This endpoint at lowpaymentfee.com provides "Premium API Access" via the x402 payment protocol on the Base network. The specific resource `/api/v1/claims/39` is one of many endpoints offered by the provider, which spans categories including data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities. All endpoints are priced at $0.02 per request, payable in USDC (USD Coin) on Base with no API keys, rate limits, or commitments required.

The x402 challenge confirms the endpoint is live, accepting POST requests and settling payments in USDC (contract `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`) on Base. The maximum amount required is 20,000 base units, which at 6 decimals equals $0.02. Payment is sent to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` with a timeout of 300 seconds.

However, the specific functionality behind `/api/v1/claims/39` is unclear. The provider's landing page lists various API categories (metrics, reports, sentiment analysis, summarization, price feeds, geocoding, etc.) but does not document a `/claims/` path. There is no OpenAPI spec, no detailed documentation (docs, pricing, and README pages all render only a "Connect wallet" prompt), and no request/response schema beyond the x402 output schema indicating it accepts HTTP POST. The actual payload format and response structure are unknown.

Capabilities

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

Use cases

  • —Programmatic access to a premium API resource without needing API key registration
  • —Agent-driven workflows that pay per request using USDC on Base
  • —Testing x402 payment protocol integrations against a live endpoint

Fit

Best for

  • —Developers experimenting with x402 payment-gated APIs
  • —AI agents with USDC wallets on Base that need on-demand API access
  • —Low-commitment, pay-as-you-go API consumption without subscriptions

Not for

  • —Users who need detailed documentation or guaranteed SLAs before integrating
  • —Use cases requiring known, well-documented request/response schemas
  • —Anyone without a Base-compatible USDC wallet

Quick start

# 1. Send a POST to discover the x402 payment challenge
curl -X POST https://lowpaymentfee.com/api/v1/claims/39
# Returns 402 with X-Payment challenge in JSON body
# 2. Construct an x402 payment header using the challenge details
#    and resend with: -H 'X-PAYMENT: <signed_payment>'

Example

Response

{
  "error": "X-PAYMENT header is required",
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "payTo": "0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3",
      "scheme": "exact",
      "network": "base",
      "mimeType": "application/json",
      "resource": "https://lowpaymentfee.com/api/v1/claims/39",
      "description": "Premium API Access",
      "maxAmountRequired": "20000",
      "maxTimeoutSeconds": 300
    }
  ],
  "x402Version": 1
}

Endpoint

URLhttps://lowpaymentfee.com/api/v1/claims/39
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.35/ 1.00

The x402 challenge is live and well-formed, confirming the endpoint exists and accepts payment. However, there is no documentation for the /claims/39 path specifically, no OpenAPI spec, no request/response schema, and the crawled docs/pricing/README pages are empty beyond a wallet-connect prompt. The actual functionality behind this endpoint is unknown.

Warnings

  • —No documentation available — docs, pricing, and README pages all render only 'Connect wallet'
  • —The /api/v1/claims/39 path is not listed among the provider's advertised endpoints; its specific function is unknown
  • —No OpenAPI spec or request/response schema provided
  • —No examples of successful (paid) responses available

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 04:24:02Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-23

Agent access

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