Create a connect link for an end user to an OAuth upstream

Answers 404 where the mcp-upstreams feature is off. Held by the developer’s server: the key needs end-users:write, which is not in the default set, and the end user consents themselves. A link one end user opens to sign in to an OAuth upstream (ADR 0026) with their own account: the same consent, confirmation and limits as an integration’s connect link. Their grant is used only for calls made for them.

POST/api/v2/mcp-upstreams/{id}/connect-links

Authorization

AuthorizationBearer token (Anlyon API key) · headerrequired

Workspace API key sent as Authorization: Bearer <key>.

better-auth.session_tokenAPI key · cookierequired

Browser session used by dashboard-only operations.

Path parameters

idstringrequired

The upstream's id (mcpu_...).

matches ^mcpu_[A-Za-z0-9_-]+$

Header parameters

X-Request-Idstring

Optional caller correlation ID. Unsafe or oversized values are replaced.

max length 128

Request body

requiredapplication/json

endUserIdstringrequired

min length 1 · max length 256

redirectUrlstring<uri> | null

max length 2048

Responses

201

The link.

successbooleanrequired

dataobjectrequired

Show properties

urlstring<uri>required

expiresAtstring<date-time>required

400

Bad Request - Invalid input data

successbooleanrequired

requestIdstringrequired

Correlation ID matching the X-Request-Id response header.

errorobjectrequired

Show properties

codestring

messagestring

detailsobject

fixErrorFix

How to get past this error, for a person or an agent. Present on refusals with a known next step, such as a missing scope or role, a plan or billing limit, a halted environment, or a missing secret, connected account, OAuth app or end-user header. Absent when there is no fix to give. Kept in production responses, unlike details.

Show properties

summarystringrequired

One sentence that says what to do.

commandstring

An exact anlyon CLI command that fixes it. Absent when no command does.

urlstring<uri>

An absolute console link where a person fixes it.

docsstring<uri>

A docs page that explains it.

401

Unauthorized - Invalid or missing API key

successbooleanrequired

requestIdstringrequired

Correlation ID matching the X-Request-Id response header.

errorobjectrequired

Show properties

codestring

messagestring

detailsobject

fixErrorFix

Show properties

summarystringrequired

One sentence that says what to do.

commandstring

An exact anlyon CLI command that fixes it. Absent when no command does.

urlstring<uri>

An absolute console link where a person fixes it.

docsstring<uri>

A docs page that explains it.

403

Authenticated credential lacks the required scope or workspace access.

successbooleanrequired

requestIdstringrequired

Correlation ID matching the X-Request-Id response header.

errorobjectrequired

Show properties

codestring

messagestring

detailsobject

fixErrorFix

Show properties

summarystringrequired

One sentence that says what to do.

commandstring

An exact anlyon CLI command that fixes it. Absent when no command does.

urlstring<uri>

An absolute console link where a person fixes it.

docsstring<uri>

A docs page that explains it.

404

Not Found - Resource does not exist

successbooleanrequired

requestIdstringrequired

Correlation ID matching the X-Request-Id response header.

errorobjectrequired

Show properties

codestring

messagestring

detailsobject

fixErrorFix

Show properties

summarystringrequired

One sentence that says what to do.

commandstring

An exact anlyon CLI command that fixes it. Absent when no command does.

urlstring<uri>

An absolute console link where a person fixes it.

docsstring<uri>

A docs page that explains it.

429

Too Many Requests - Rate limit exceeded. A workspace's API requests are limited per minute and per UTC clock hour by plan; Retry-After says when to try again, and an hourly refusal names the limit and when the count resets. Successful responses carry the same limits in X-RateLimit-Limit, X-RateLimit-Remaining, X-RateLimit-Reset (the minute) and X-RateLimit-Limit-Hour, X-RateLimit-Remaining-Hour, X-RateLimit-Reset-Hour (the hour).

successbooleanrequired

requestIdstringrequired

Correlation ID matching the X-Request-Id response header.

errorobjectrequired

Show properties

codestring

messagestring

detailsobject

fixErrorFix

Show properties

summarystringrequired

One sentence that says what to do.

commandstring

An exact anlyon CLI command that fixes it. Absent when no command does.

urlstring<uri>

An absolute console link where a person fixes it.

docsstring<uri>

A docs page that explains it.

Try it

Server

Base URLCustom base URLOverrides the selected server when set.

Authorization

Bearer token (Anlyon API key)Remember on this deviceInclude my values in samples

Parameters

X-Request-IdheaderOptional caller correlation ID. Unsafe or oversized values are replaced.idpath*The upstream's id (mcpu_...).

Bodyapplication/json

endUserIdstring*redirectUrlstring

Request

curl -X POST 'https://api.anlyon.com/api/v2/mcp-upstreams/string/connect-links' \
  -H 'Authorization: Bearer YOUR_TOKEN' \
  -H 'Accept: application/json' \
  -H 'Content-Type: application/json' \
  -d '{
  "endUserId": "string",
  "redirectUrl": "http://example.com"
}'

const response = await fetch("https://api.anlyon.com/api/v2/mcp-upstreams/string/connect-links", {
  method: "POST",
  headers: {
    "Authorization": "Bearer YOUR_TOKEN",
    "Accept": "application/json",
    "Content-Type": "application/json"
  },
  body: "{\n  \"endUserId\": \"string\",\n  \"redirectUrl\": \"http://example.com\"\n}"
});

import requests

response = requests.post(
    "https://api.anlyon.com/api/v2/mcp-upstreams/string/connect-links",
    headers={
        "Authorization": "Bearer YOUR_TOKEN",
        "Accept": "application/json",
        "Content-Type": "application/json"
    },
    data="{\n  \"endUserId\": \"string\",\n  \"redirectUrl\": \"http://example.com\"\n}",
)

Response

{
  "success": true,
  "data": {
    "url": "http://example.com",
    "expiresAt": "2019-08-24T14:15:22Z"
  }
}

{
  "success": false,
  "error": {
    "code": "VALIDATION_ERROR",
    "message": "Invalid request data",
    "details": {
      "url": "Invalid URL format"
    }
  }
}

{
  "success": false,
  "error": {
    "code": "AUTHENTICATION_ERROR",
    "message": "Invalid or missing API key"
  }
}

{
  "success": false,
  "requestId": "req_0123456789abcdef0123456789abcdef",
  "error": {
    "code": "VALIDATION_ERROR",
    "message": "Invalid request data",
    "details": {},
    "fix": {
      "summary": "Log in again and approve the anlyon:secrets consent group, which grants secrets:write.",
      "command": "anlyon auth login --scope anlyon:secrets",
      "url": "https://console.anlyon.com/settings/api-keys",
      "docs": "https://docs.anlyon.com/cli/authentication"
    }
  }
}

{
  "success": false,
  "error": {
    "code": "NOT_FOUND",
    "message": "Resource not found"
  }
}

{
  "success": false,
  "error": {
    "code": "RATE_LIMIT_EXCEEDED",
    "message": "Rate limit exceeded. Please try again later."
  }
}