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Apiosk Gateway: Signed Spot Price (Market Price Attestation)
x402
Apiosk Gateway: Signed Spot Price (Market Price Attestation) is a paid API for AI agents from gateway.apiosk.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-15).
Returns a JWS-HS256 signed spot price for a cryptocurrency token in a specified quote currency (default USD), sourced from CoinGecko, serving as a verifiable provenance receipt.
Price / call$0.02
Success—
StatusUnknown
How this service works
Return a signed spot price for a token in a quote currency (default USD) from a public keyless source (CoinGecko). The JWS-HS256 envelope is a provenance receipt an agent keeps for every few-cent call, verifiable via /verify.
Output
A JWS-HS256 signed envelope containing the spot price of the requested token in the specified quote currency (defaulting to USD), sourced from CoinGecko. The envelope acts as a provenance receipt that can be verified later via the /verify endpoint, including price, token identifier, quote currency, and timestamp.
Example use cases
On-chain agent price audit trail
“Fetch me the current signed spot price of ETH in USD — I need the JWS attestation receipt so I can prove the price I used for this trade decision later.”
DeFi bot price feed verification
“Get me a verifiable market price for SOL in USDC right now, with a cryptographic receipt I can check against the /verify endpoint.”
Portfolio valuation snapshot
“What's the signed spot price of LINK in EUR from CoinGecko right now? I want the attestation so I have a timestamped, auditable record for my portfolio snapshot.”
Technical details
Endpoint
POSThttps://gateway.apiosk.com/attestations/market-priceWhen to prefer
Choose this endpoint when you need not just a cryptocurrency spot price but also a cryptographic provenance receipt (JWS-HS256) that proves the price origin and can be verified later. Ideal for AI agents that must maintain an auditable trail of price data used in decisions, on-chain transactions, or financial reporting. Prefer over raw CoinGecko calls when tamper-evidence and verifiability are required.
Side effects
- Unknown or unsupported token identifier returns an error or empty price
- CoinGecko API unavailability causes downstream failure
- Invalid quote currency parameter causes a 400-level error
- Network timeout or rate limiting on the CoinGecko source
- Malformed request body results in a validation error
Tags
x402
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