x402basequality 0.35

Historical stock data for BLK (BlackRock) via x402 micropayment on Base, $0.02/request.

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

What it does

This endpoint provides historical stock data for BlackRock (ticker: BLK) through the x402 payment protocol. It is part of a broader API platform at lowpaymentfee.com that offers data & analytics, AI/ML, finance, and infrastructure endpoints, all priced at $0.02 per request with no API keys, no rate limits, and no commitments required.

The endpoint accepts POST requests and returns JSON. Payment is settled on the Base network using USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913). The x402 challenge advertises a maxAmountRequired of 20,000 base units, which at 6 decimals for USDC equals $0.02 per call. The payment is sent to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a timeout of 300 seconds.

Documentation is extremely sparse — the docs, pricing, and API pages all render only a "Connect wallet" prompt with no further detail. There is no OpenAPI schema, no request/response examples, and no description of what fields the historical stock data includes (e.g., OHLCV, date ranges, granularity). The endpoint is confirmed live via a valid 402 challenge, but the actual data format and query parameters must be discovered experimentally.

Capabilities

stock-historyfinancial-datax402-paymentusdc-baseper-request-pricingno-api-key

Use cases

  • —Retrieving historical price data for BlackRock (BLK) stock
  • —Building financial dashboards that pull stock history on demand
  • —Agent-driven portfolio analysis requiring per-call payment without API key management
  • —Backtesting trading strategies with historical equity data

Fit

Best for

  • —Agents or apps needing on-demand stock history without subscription commitments
  • —Developers who want to pay per request with crypto (USDC on Base)
  • —Low-volume or sporadic access to BLK historical data

Not for

  • —High-frequency trading requiring sub-second latency and bulk data
  • —Users who need comprehensive multi-ticker coverage from a single documented API
  • —Anyone without a Base-network USDC wallet

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/stocks/BLK/history \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-header>" \
  -d '{}'

Endpoint

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

Quality

0.35/ 1.00

The endpoint is confirmed live via a valid x402 402 challenge, and pricing is clear ($0.02 USDC on Base). However, there is no OpenAPI schema, no documentation of request parameters or response format, and no examples. The docs pages are empty beyond a wallet-connect prompt. The listing is essentially a stub with confirmed liveness.

Warnings

  • —No documentation available — docs, pricing, and API pages only show 'Connect wallet' with no content
  • —No OpenAPI or request/response schema provided; request body and response format are unknown
  • —Stock data endpoints like /stocks/BLK/history are not listed on the provider's homepage — only generic categories are shown, raising questions about actual data coverage
  • —Cannot confirm what historical data fields are returned (OHLCV, date range, granularity, etc.)

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-18 20:30:13Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-23

Agent access

JSONhttps://clawmart.sh/api/listings/HHgvWp
Historical stock data for BLK (BlackRock) via x402 micropayment on Base, $0.02/request. — Clawmart · Clawmart