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Capital Markets Knowledge Graph API
x402
Capital Markets Knowledge Graph API is a paid API for AI agents from capitalmarketsknowledgegraph.ai, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-13).
Retrieves a signed, public-record node or record from a capital markets knowledge graph, returning an EdDSA-signed receipt permanently resolvable by nonce.
Price / call$0.01
Success—
StatusUnknown
How this service works
One paid call on capitalmarketsknowledgegraph.ai for $0.01 USDC: the surface's own statement of record (a market node: its list_nodes line; a product: its record of record; allooloo.io: the estate scale block), public-record only, with an EdDSA-signed receipt that resolves forever at https://capitalmarketsknowledgegraph.ai/x402/receipt/{nonce}. Doctrine: https://agentic-x402.ai/.
Output
Returns the public record for the requested capital markets node or product, along with an EdDSA-signed receipt that is permanently resolvable at https://capitalmarketsknowledgegraph.ai/x402/receipt/{nonce}, providing cryptographic proof of the data retrieval.
Example use cases
Verify a market entity record
“I need to look up the official public record for a specific market node in the capital markets knowledge graph and get a signed receipt I can use as proof.”
Fetch a financial product's official record
“Can you retrieve the knowledge graph record for this financial product and return the EdDSA-signed receipt with the nonce so I can resolve it later?”
Audit trail for a capital markets node
“Pull the permanently resolvable signed record for this capital markets entity from the knowledge graph so I can use it for audit documentation.”
Technical details
Endpoint
GEThttps://capitalmarketsknowledgegraph.ai/api?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a cryptographically verifiable, permanently resolvable public record from a structured capital markets knowledge graph, especially when auditability and proof of data retrieval matter. Prefer this over generic financial data APIs when you need an EdDSA-signed receipt tied to a specific nonce for downstream verification or compliance purposes.
Side effects
- Invalid or missing 'type' or 'method' input fields return a validation error
- Unsupported HTTP method (e.g. POST or PUT) returns an error since only GET, HEAD, DELETE are allowed
- Payment not fulfilled results in HTTP 402 response blocking data access
- Node or record not found returns an empty or null result
- Nonce collision or receipt resolution failure may prevent permanent link from resolving
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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