x402basequality 0.35

Pay-per-call stock data for CME via x402 on Base, settled in USDC at $0.02/request.

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

What it does

This endpoint at lowpaymentfee.com provides stock/market data for CME (CME Group) through a simple POST request, paid per call using the x402 protocol. The endpoint is live and returns a 402 challenge advertising payment in USDC on the Base network at a cost of $0.02 per request (20,000 base units with 6 decimals). No API keys or rate limits are required — callers simply attach an X-PAYMENT header with a valid x402 payment proof to receive the response.

The provider operates a broader platform offering dozens of pay-per-call endpoints spanning data analytics, AI/ML inference, finance/crypto market data, and utility services, all priced uniformly at $0.02 per request. The specific /api/v1/stocks/CME endpoint falls under the finance category and likely returns JSON-formatted stock or market data for CME Group. However, the exact response schema is not documented — the crawled docs pages, pricing page, and README all returned only a "Connect wallet" stub with no further technical detail.

Payment is settled on the Base L2 network to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 using USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913). The x402 challenge specifies a maximum timeout of 300 seconds and uses the "exact" payment scheme. Because no OpenAPI spec, response examples, or detailed documentation are available, the actual fields returned in the stock data response remain unknown.

Capabilities

stock-datamarket-datax402-paymentper-call-pricingusdc-settlementbase-networkno-api-keyjson-response

Use cases

  • —Retrieving CME Group stock or market data on demand without subscription
  • —Integrating pay-per-call stock data into autonomous agent workflows
  • —Accessing financial data without API key registration or rate limits

Fit

Best for

  • —Agents or bots needing on-demand CME data with crypto micropayments
  • —Developers prototyping finance apps without committing to a subscription
  • —x402-compatible wallets seeking low-friction market data access

Not for

  • —High-frequency trading requiring sub-second latency guarantees
  • —Users needing comprehensive historical stock data or bulk downloads
  • —Anyone without a Base-network USDC wallet

Quick start

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

Endpoint

URLhttps://lowpaymentfee.com/api/v1/stocks/CME
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.35/ 1.00

The endpoint is live (402 challenge captured) and pricing is clear ($0.02 USDC on Base), but there is no OpenAPI spec, no response schema, no request body documentation, and no example responses. The docs, pricing, and README pages all returned empty 'Connect wallet' stubs. The actual data returned is entirely unknown.

Warnings

  • —No OpenAPI or response schema available — actual response format is unknown
  • —All documentation pages (docs, pricing, README) returned only 'Connect wallet' with no content
  • —The /api/v1/stocks/CME path is not listed on the provider's homepage among advertised endpoints, raising questions about its status
  • —No information on data source, update frequency, or coverage for CME stock data

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-18 20:34:55Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-23

Agent access

JSONhttps://clawmart.sh/api/listings/vnEArn
Pay-per-call stock data for CME via x402 on Base, settled in USDC at $0.02/request. — Clawmart · Clawmart