🙇Authentication

User signature is required to fetch data

Arrange Data

First, you need to arrange data which will be used to generate message

{
    "owner": "string" // can be address or DID
}

Generate a message

Generate Message to read data

post

/authentication/generate-message

Authorizations

secret-keystringRequired

Body

ownerstringOptional

Responses

200Success

application/json

400Error

application/json

401Error

application/json

post/authentication/generate-message

POST /v1/authentication/generate-message HTTP/1.1
Host: sandbox-api.fetcch.xyz
secret-key: YOUR_API_KEY
Content-Type: application/json
Accept: */*
Content-Length: 16

{
  "owner": "text"
}

{
  "status": "text",
  "data": {
    "message": "text",
    "timestamp": 1
  },
  "timestamp": "2026-01-01T00:00:00.000Z"
}

Generate Access Tokens

Sign the above message using the appropriate address and arrange data in below format

{
    "owner": "string",
    "signature": "string",
    "timestamp": "number"
}

signature is the obtained by signing the above generated message and timestamp is also given in the response of this

timestamp can't be older than 5 minutes

Authenticate the signature

post

/authentication

Authorizations

secret-keystringRequired

Body

ownerstringOptional

signaturestringOptional

timestampintegerOptional

Responses

200Success

application/json

400Error

application/json

401Error

application/json

post/authentication

POST /v1/authentication HTTP/1.1
Host: sandbox-api.fetcch.xyz
secret-key: YOUR_API_KEY
Content-Type: application/json
Accept: */*
Content-Length: 49

{
  "owner": "text",
  "signature": "text",
  "timestamp": 1
}

{
  "status": "text",
  "data": {
    "accessToken": "text",
    "expiry": "2026-01-01T00:00:00.000Z"
  },
  "timestamp": "2026-01-01T00:00:00.000Z"
}

Authenticate

To authenticate, just include the received accessToken in headers as authorization in format bearer ${accessToken}