Eckari fixture echo (deterministic test capability)
eckari.fixture.echov1.0.0experimentalregion global
Deterministic zero-cost capability used to prove the Eckari commercial spine end to end (account key and x402 access, ledger, billing export). Echoes the value with a checksum. It has no external data and is not intended for production agent use.
Account price
USD 0.001
per successful call
x402 price
USD 0.001
accountless, settled per call
Provenance
eckari_fixture
cache: none
Endpoint
GET https://api-staging.eckari.com/v1/fixture/echo/{value}
curl -i "https://api-staging.eckari.com/v1/fixture/echo/hello?repeat=2"
Without credentials the gateway responds 402 with a PAYMENT-REQUIRED header (x402 v2). Retry with PAYMENT-SIGNATURE. See docs.
Use when
- Test an Eckari integration or payment flow without calling a real upstream provider.
Do not use when
- You need real data; use a domain capability such as company.uk.status.
Synonyms
eckari test endpointecho fixture
Input schema
{
"type": "object",
"additionalProperties": false,
"required": [
"value"
],
"properties": {
"value": {
"type": "string",
"minLength": 1,
"maxLength": 64,
"pattern": "^[A-Za-z0-9._-]+$"
},
"repeat": {
"type": "integer",
"minimum": 1,
"maximum": 5
}
}
}Output schema
{
"type": "object",
"additionalProperties": false,
"required": [
"value",
"repeated",
"length",
"checksum"
],
"properties": {
"value": {
"type": "string"
},
"repeated": {
"type": "array",
"items": {
"type": "string"
}
},
"length": {
"type": "integer"
},
"checksum": {
"type": "string",
"description": "SHA-256 hex digest of value."
}
}
}Example input · echo
{
"value": "hello",
"repeat": 2
}Example response
{
"data": {
"value": "hello",
"repeated": [
"hello",
"hello"
],
"length": 5,
"checksum": "2cf24dba5fb0a30e26e83b2ac5b9e29e1b161e5c1fa7425e73043362938b9824"
},
"meta": {
"capability": "eckari.fixture.echo",
"version": "1.0.0",
"retrieved_at": "2026-08-17T12:00:00Z",
"source": "eckari_fixture",
"freshness": "live",
"request_id": "req_example"
}
}