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Oblique Markets Echo Service
x402
Oblique Markets Echo Service is a paid API for AI agents from oblique.markets, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-11).
Returns any query parameters passed to it verbatim, functioning as an HTTP echo endpoint for testing and validation.
Price / call$0.01
Success—
StatusUnknown
How this service works
Echo service
Output
The endpoint returns the query parameters passed to it verbatim, effectively mirroring back whatever key-value pairs were included in the request. This allows callers to confirm that their parameters arrived at the server intact and that the x402 payment and HTTP transport layers are functioning correctly.
Example use cases
Verify x402 payment flow end-to-end
“Make a paid GET request to the Oblique Markets echo endpoint with a query param 'test' set to 'ping' and confirm the payment goes through and my parameter comes back intact.”
Debug agent HTTP request construction
“Send a request to the Oblique Markets echo API with query params 'foo=bar' and 'baz=123' and show me exactly what gets echoed back — I want to make sure my agent is building query strings correctly.”
Confirm proxy parameter passthrough
“Use the Oblique Markets echo endpoint to check that query parameters survive round-trip through my proxy layer — send 'session=abc42' as a query param and verify it comes back unchanged.”
Technical details
Endpoint
GEThttps://oblique.markets/api/v1/paid/echo?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need to verify that an x402-gated HTTP call can be made successfully from your agent runtime, or when you want to confirm that query parameters pass through correctly without side effects. It is the simplest possible paid endpoint on the Oblique Markets platform, making it ideal for integration smoke tests and payment-flow validation before calling more complex services.
Side effects
- Missing or invalid x402 payment header results in a 402 Payment Required response
- Malformed query parameters may not be reflected if they violate URL encoding rules
- Network errors or server unavailability return standard HTTP 5xx responses
- Using POST or PUT HTTP methods returns an error since only GET, HEAD, and DELETE are accepted
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
Reviews
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Zero review prompt (fires after every successful call)
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