x402basequality 0.35

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/wire/118

What it does

This endpoint at lowpaymentfee.com provides "Premium API Access" via the x402 payment protocol. The specific resource path `/api/v1/wire/118` is not explicitly listed on the provider's landing page among their named API categories, so its exact functionality is unclear. However, the provider operates a broad suite of pay-per-call APIs spanning data & analytics, AI & machine learning (sentiment analysis, summarization, classification, embeddings), finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation).

The endpoint is live and returns a valid x402 challenge. Payment is settled on the Base network using USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) with an exact-scheme payment of up to 20,000 base units. Since USDC uses 6 decimals, this translates to $0.02 per request, consistent with the provider's advertised flat pricing of $0.02/request across all endpoints. The x402 protocol means no API keys or accounts are needed — callers simply attach an X-PAYMENT header with a signed payment to access the resource.

Documentation is extremely sparse. The /docs, /api, /pricing, and /README pages all render only a "Connect wallet" prompt with no additional technical content. There is no OpenAPI spec, no request/response schema documentation, and no examples for this specific endpoint. The input schema indicates it accepts HTTP POST requests and is marked as discoverable, but no request body schema or response format is documented.

Capabilities

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

Use cases

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

Fit

Best for

  • —Developers wanting zero-signup, pay-per-call API access
  • —AI agents that can settle x402 payments autonomously on Base
  • —Users who prefer crypto micropayments over subscription billing

Not for

  • —Users who need detailed API documentation or request/response schemas before integrating
  • —High-volume consumers who want bulk pricing or subscription discounts
  • —Developers without a Base-compatible wallet or USDC holdings

Quick start

# The endpoint requires an x402 X-PAYMENT header with a signed USDC payment on Base.
# Without payment, it returns 402 with the payment challenge:
curl -X POST https://lowpaymentfee.com/api/v1/wire/118
# Returns 402 with x402 challenge JSON describing payment terms ($0.02 USDC on Base)

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/wire/118",
      "description": "Premium API Access",
      "maxAmountRequired": "20000",
      "maxTimeoutSeconds": 300
    }
  ],
  "x402Version": 1
}

Endpoint

URLhttps://lowpaymentfee.com/api/v1/wire/118
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.35/ 1.00

The endpoint is live and returns a valid x402 challenge with clear pricing ($0.02 USDC on Base). However, the specific /api/v1/wire/118 path is not documented anywhere, there is no OpenAPI spec, no request/response schema, and all documentation pages are empty beyond a wallet connect prompt. The actual functionality behind this endpoint is unknown.

Warnings

  • —The specific endpoint /api/v1/wire/118 is not listed among the provider's documented APIs — its purpose is unclear
  • —No documentation exists: /docs, /api, /pricing, and /README pages are all empty (show only 'Connect wallet')
  • —No OpenAPI spec, request body schema, or response schema is available
  • —No examples of successful (paid) responses are available

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 14:45:16Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/52gkHp
Pay-per-call premium API access on Base via x402 — $0.02/request in USDC. — Clawmart · Clawmart