x402basequality 0.40

YFI OHLCV candlestick data via x402 micropayment on Base, $0.02 per request.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/crypto/YFI/ohlcv

What it does

This endpoint provides OHLCV (Open, High, Low, Close, Volume) candlestick data for the Yearn Finance (YFI) token. It is part of the lowpaymentfee.com platform, which offers a variety of data, AI, finance, and utility APIs all gated behind the x402 payment protocol. Each request costs $0.02 in USDC on the Base network — no API keys, no rate limits, and no subscriptions required.

The endpoint accepts POST requests and returns JSON. Payment is handled via the x402 protocol: callers include an X-PAYMENT header with a signed payment authorization for 0.02 USDC (20,000 base units at 6 decimals) to the provider's address on Base. The payment settles using the "exact" scheme with USDC (contract 0x8335…2913) and supports a 300-second timeout window.

The broader lowpaymentfee.com platform lists additional crypto endpoints (token quotes, gas estimates, price feeds, exchange rates) as well as AI/ML endpoints (sentiment analysis, summarization, classification, embeddings) and utility services (geocoding, validation, conversion). All share the same $0.02 per-request pricing model. Documentation beyond the landing page is sparse — the /docs, /pricing, and /api pages only show a wallet-connect prompt with no further technical detail.

Capabilities

ohlcv-datacrypto-market-datayfi-tokenx402-paymentusdc-base-networkper-request-pricingno-api-keyjson-response

Use cases

  • —Fetching YFI historical price candles for charting or technical analysis
  • —Programmatic trading bots that need YFI OHLCV data on demand
  • —AI agents that need real-time crypto market data without managing API keys
  • —Portfolio dashboards displaying YFI price movements

Fit

Best for

  • —Agents or bots that can pay per-request with USDC on Base
  • —Developers who want keyless, pay-as-you-go crypto market data
  • —Low-volume or sporadic YFI data lookups where subscriptions are overkill

Not for

  • —High-frequency trading requiring sub-second latency and bulk historical data (no documented bulk endpoints)
  • —Users without a Base-network USDC wallet or x402-compatible client
  • —Anyone needing detailed API documentation or guaranteed SLAs (docs are minimal)

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/crypto/YFI/ohlcv \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-signed-payment-header>"

Example

Request

{
  "url": "https://lowpaymentfee.com/api/v1/crypto/YFI/ohlcv",
  "method": "POST",
  "headers": {
    "X-PAYMENT": "<x402-signed-payment-header>",
    "Content-Type": "application/json"
  }
}

Endpoint

URLhttps://lowpaymentfee.com/api/v1/crypto/YFI/ohlcv
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.40/ 1.00

The x402 challenge is live and well-formed, confirming the endpoint exists and accepts payment. However, there is no OpenAPI schema, no response examples, no documentation of request parameters (e.g., time range, interval), and the docs/pricing/API pages are empty beyond a wallet-connect prompt. The actual response format is entirely unknown.

Warnings

  • —No API documentation available — /docs, /pricing, /api, and /README pages all render only a wallet-connect prompt with no technical content.
  • —Request parameters (time range, candle interval, etc.) are undocumented; callers must guess or experiment.
  • —Response schema is unknown — no examples or OpenAPI spec provided.
  • —The broader platform lists many endpoints but none have visible documentation, raising questions about maturity.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-18 21:30:13Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-23

Agent access

JSONhttps://clawmart.sh/api/listings/hfPDgp
YFI OHLCV candlestick data via x402 micropayment on Base, $0.02 per request. — Clawmart · Clawmart