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/trades/133

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/trades/133` appears to be part of a broader platform offering dozens of pay-per-call API endpoints spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities — all priced at $0.02 per request in USDC.

The endpoint is live and returns a valid x402 challenge (HTTP 402) requesting payment of up to 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 given USDC's 6 decimals. Payment is made via the `exact` scheme to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3, with a 300-second timeout. The response MIME type is `application/json` and the input method is HTTP POST.

The specific functionality behind `/api/v1/trades/133` is not documented in the crawled material. The path suggests it may relate to a specific trade record or trade-related data, but this is speculative — the platform's landing page lists categories like "Finance & Web3" with price feeds, exchange rates, token quotes, and gas estimates, but does not explicitly list a `/trades` endpoint. Documentation pages (`/docs`, `/pricing`, `/README`) returned only a "Connect wallet" prompt with no substantive content. Without further documentation, the exact request format and response schema for this endpoint remain unknown.

Capabilities

x402-paymentusdc-settlementbase-networkpay-per-requestjson-apino-api-keyhttp-post

Use cases

  • —Accessing trade-related data or executing trade queries without needing an API key or subscription
  • —Programmatic pay-per-call access to financial or data endpoints settled in USDC on Base
  • —Agent-driven workflows that need low-friction, per-request payment for premium data

Fit

Best for

  • —Developers or agents wanting zero-signup, pay-as-you-go API access
  • —Use cases requiring USDC micropayments on Base L2 for low transaction fees
  • —Automated agents that can handle x402 payment challenges natively

Not for

  • —Users who need detailed API documentation or guaranteed SLAs before integrating
  • —High-volume consumers who would benefit from bulk pricing or subscription plans
  • —Anyone unable to settle payments in USDC on the Base network

Quick start

# 1. Send POST to the endpoint — you'll get a 402 with payment details
curl -X POST https://lowpaymentfee.com/api/v1/trades/133

# 2. Parse the 402 JSON challenge, construct an x402 payment header
#    (maxAmountRequired: 20000 base units = $0.02 USDC on Base)
# 3. Resend with X-PAYMENT header containing signed payment proof

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/trades/133",
      "description": "Premium API Access",
      "maxAmountRequired": "20000",
      "maxTimeoutSeconds": 300
    }
  ],
  "x402Version": 1
}

Endpoint

URLhttps://lowpaymentfee.com/api/v1/trades/133
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.35/ 1.00

The endpoint is live with a valid x402 challenge and clear pricing ($0.02 USDC on Base), but there is no documentation for the specific /trades/133 resource — no request schema, no response schema, no description of what it returns. The docs, pricing, and README pages are all empty (just 'Connect wallet'). The listing is essentially a stub with payment metadata only.

Warnings

  • —No documentation available for /api/v1/trades/133 — the exact functionality, request format, and response schema are unknown
  • —All documentation pages (/docs, /pricing, /README) returned only 'Connect wallet' with no content
  • —The /trades/133 path is not listed among the advertised endpoints on the landing page — its purpose is unclear
  • —No OpenAPI spec or machine-readable schema is available

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 11:31:22Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-26

Agent access

JSONhttps://clawmart.sh/api/listings/rTxuTm