curl --request GET \
--url https://api.reasonmachines.com/v3/self \
--header 'Authorization: Bearer <token>'import requests
url = "https://api.reasonmachines.com/v3/self"
headers = {"Authorization": "Bearer <token>"}
response = requests.get(url, headers=headers)
print(response.text)const options = {method: 'GET', headers: {Authorization: 'Bearer <token>'}};
fetch('https://api.reasonmachines.com/v3/self', options)
.then(res => res.json())
.then(res => console.log(res))
.catch(err => console.error(err));<?php
$curl = curl_init();
curl_setopt_array($curl, [
CURLOPT_URL => "https://api.reasonmachines.com/v3/self",
CURLOPT_RETURNTRANSFER => true,
CURLOPT_ENCODING => "",
CURLOPT_MAXREDIRS => 10,
CURLOPT_TIMEOUT => 30,
CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
CURLOPT_CUSTOMREQUEST => "GET",
CURLOPT_HTTPHEADER => [
"Authorization: Bearer <token>"
],
]);
$response = curl_exec($curl);
$err = curl_error($curl);
curl_close($curl);
if ($err) {
echo "cURL Error #:" . $err;
} else {
echo $response;
}package main
import (
"fmt"
"net/http"
"io"
)
func main() {
url := "https://api.reasonmachines.com/v3/self"
req, _ := http.NewRequest("GET", url, nil)
req.Header.Add("Authorization", "Bearer <token>")
res, _ := http.DefaultClient.Do(req)
defer res.Body.Close()
body, _ := io.ReadAll(res.Body)
fmt.Println(string(body))
}HttpResponse<String> response = Unirest.get("https://api.reasonmachines.com/v3/self")
.header("Authorization", "Bearer <token>")
.asString();require 'uri'
require 'net/http'
url = URI("https://api.reasonmachines.com/v3/self")
http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true
request = Net::HTTP::Get.new(url)
request["Authorization"] = 'Bearer <token>'
response = http.request(request)
puts response.read_body{
"principal_type": "service_user",
"service_user_id": "key_3f9a",
"service_user_name": "ci-bot",
"org_id": "org_8c2d1e",
"scopes": [
"run",
"sessions:read",
"repos:read"
]
}{
"error": "missing_bearer",
"message": "Authorization required"
}{
"error": "missing_scope",
"required_scope": "sessions:read"
}{
"error": {
"type": "rate_limited",
"message": "This API key exceeded its request-rate limit"
}
}Verify credentials
Returns the principal behind the current credential, its granted scopes, and the organization it can act on. Call this first to discover your org_id and available capabilities.
REST quickstart
- Create a key in Settings > API. Send it only in
Authorization: Bearer <key>, never in a URL. - Call this endpoint and keep the returned
org_id. Creating and polling a session requiresrunandsessions:read. - Optionally discover repositories with
GET /v3/organizations/{orgId}/repositories(repos:read) and Projects withGET /v3/organizations/{orgId}/projects(sessions:read). Use an accessible Project ID; selecting a Project does not automatically select its repository or execution target. - POST a prompt to
/v3/organizations/{orgId}/sessions. Setcompletion_mode: run_outcomefor unattended work and anidempotency_keyin the JSON body. Retrying the same task must reuse the same key and project/target/policy. HTTP 201 creates; HTTP 200 replays. - Poll the returned session ID with GET until status leaves running. Lifecycle exit does not prove success: inspect
outcome,result,result_summary, and diagnostics. Only outcome success is a successful task; failure, action_required and null need handling. FollowRetry-Afteron HTTP 429.
Runnable Node.js example
Download api-session.mjs, review it, and run it with Node.js 20 or newer. It creates real work that may incur usage. Set REASON_API_KEY, REASON_PROMPT, and a stable REASON_IDEMPOTENCY_KEY in your environment, then run node api-session.mjs. Optional REASON_REPO and REASON_PROJECT_ID select resources explicitly. The example exits nonzero for failed, suspended, unresolved, or action-required tasks and times out after ten minutes without cancelling the remote session.
MCP is a separate client connection
For an MCP client, connect to https://mcp.reasonmachines.com/mcp using that client’s supported OAuth setup. The REST workflow above uses the HTTP API and does not require installing an MCP client.
curl --request GET \
--url https://api.reasonmachines.com/v3/self \
--header 'Authorization: Bearer <token>'import requests
url = "https://api.reasonmachines.com/v3/self"
headers = {"Authorization": "Bearer <token>"}
response = requests.get(url, headers=headers)
print(response.text)const options = {method: 'GET', headers: {Authorization: 'Bearer <token>'}};
fetch('https://api.reasonmachines.com/v3/self', options)
.then(res => res.json())
.then(res => console.log(res))
.catch(err => console.error(err));<?php
$curl = curl_init();
curl_setopt_array($curl, [
CURLOPT_URL => "https://api.reasonmachines.com/v3/self",
CURLOPT_RETURNTRANSFER => true,
CURLOPT_ENCODING => "",
CURLOPT_MAXREDIRS => 10,
CURLOPT_TIMEOUT => 30,
CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
CURLOPT_CUSTOMREQUEST => "GET",
CURLOPT_HTTPHEADER => [
"Authorization: Bearer <token>"
],
]);
$response = curl_exec($curl);
$err = curl_error($curl);
curl_close($curl);
if ($err) {
echo "cURL Error #:" . $err;
} else {
echo $response;
}package main
import (
"fmt"
"net/http"
"io"
)
func main() {
url := "https://api.reasonmachines.com/v3/self"
req, _ := http.NewRequest("GET", url, nil)
req.Header.Add("Authorization", "Bearer <token>")
res, _ := http.DefaultClient.Do(req)
defer res.Body.Close()
body, _ := io.ReadAll(res.Body)
fmt.Println(string(body))
}HttpResponse<String> response = Unirest.get("https://api.reasonmachines.com/v3/self")
.header("Authorization", "Bearer <token>")
.asString();require 'uri'
require 'net/http'
url = URI("https://api.reasonmachines.com/v3/self")
http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true
request = Net::HTTP::Get.new(url)
request["Authorization"] = 'Bearer <token>'
response = http.request(request)
puts response.read_body{
"principal_type": "service_user",
"service_user_id": "key_3f9a",
"service_user_name": "ci-bot",
"org_id": "org_8c2d1e",
"scopes": [
"run",
"sessions:read",
"repos:read"
]
}{
"error": "missing_bearer",
"message": "Authorization required"
}{
"error": "missing_scope",
"required_scope": "sessions:read"
}{
"error": {
"type": "rate_limited",
"message": "This API key exceeded its request-rate limit"
}
}Authorizations
Your Reason API key from Settings > API. New keys use reason_; legacy ara_ keys remain accepted. Keys are capability-scoped: run, mcp:read, mcp:write, secrets:read, secrets:write, sessions:read, sessions:debug, knowledge:read, memory:read, memory:write, skills:read, skills:write, repos:read, repos:write, reviews:read, reviews:write, deployment:read, analytics:read, org:read, org:write, attachments:read, attachments:write, guardrails:read, guardrails:write, automations:read, automations:write, agent_auth:read. mcp:write manages MCP server configuration only; it does not authorize remote MCP-tool execution. sessions:debug is privileged: it expands diagnostic session events only for organization owners/admins.
Response
The authenticated principal.
API keys resolve to service_user; MCP OAuth grants resolve to user.
service_user, user Organization pinned to the current credential.
Capabilities granted to the current API key or OAuth token.
Present when principal_type is service_user.
Present when principal_type is service_user.
Present when principal_type is user.
Present when principal_type is user.
Present when principal_type is user.
Display name of the organization pinned to this credential.
URL slug of the organization pinned to this credential.
Active MCP OAuth client grants for the signed-in user and organization.
Show child attributes
Show child attributes

