Capabilities · Authentication
Reproduce the login, session and token machinery.
Authentication is a sequence, not a single request. We trace the steps from first launch to a valid session, then rebuild the sequence so your client is seen the same way.
POST /auth/device install id + device key POST /oauth/token grant_type + proof access_token: eyJhb...K3A refresh_token: r2f0...91c GET /me (access token)
You hold the token, the refresh token, and any server-side state the app created. Reproducing one without the rest fails.
The pieces
What an auth flow carries
How the app sends the password or proof, and whether it wraps the call in extra values.
A first call that records the install, derives an identifier, and binds the token to it.
What the app sends to earn an access token, and how long that token stays valid.
The call that trades a refresh token for a new access token once the old one expires.
Grant type, client id, scope and PKCE. Those parameters are part of the request.
Fresh values the app adds to a call, which a reproduction must generate on each attempt.
Session state
State you may have to recreate
An endpoint can reject a valid token because the session it belongs to does not exist. We map what the server remembers so the client can offer it.
- Cookies set during login
- Device-bound identifiers
- Server-side session records
- Scope granted to the token
- Tokens cached by the app
- Time-based validity
- A per-session secret
- Proof-of-possession checks
Binding
Auth is often device or secret bound
Derive the device value
Read the identifier the app builds, and the key it signs it with.
Replay registration
Perform the registration call so the server creates the session your token belongs to.
Hold the secret
Keep whatever value signs or proves the session, and refresh it when the server asks.
Valid credentials can fail if the device or secret binding is missing. Reproduce the binding along with the token.
Reproduce it
Rebuild the sequence, not the screenshot
# OAuth refresh example; configure the app's token endpoint and client auth.
import requests
def refresh(token_url, refresh_token, client_id):
response = requests.post(
token_url,
data={"grant_type": "refresh_token",
"refresh_token": refresh_token,
"client_id": client_id},
timeout=30,
)
response.raise_for_status()
tokens = response.json()
access_token = tokens["access_token"]
next_refresh = tokens.get("refresh_token", refresh_token)
return access_token, next_refresh
OAuth refresh example. Use the token endpoint and client authentication required by the service. RFC 6749, section 6.
Where the flow needs a nonce, a timestamp, or a signature over the token request, those steps sit inside the sequence. We fold them in, so the reproduction keeps working past the first call.
Send us the app
Need a session that holds?
We rebuild the login, registration and token flow so your client gets a valid session.
One full APK. One complete delivery.
Projects start at $120. Most are delivered in 24 to 72 hours.
Every format included
Python, JavaScript/TypeScript, Postman and complete API documentation cover the same full endpoint set. Your team runs the clients in its own server or system.
Ready in 24–72 hours
The delivery window starts after we receive the APK and any account access needed to run it. The fixed quote states the deadline. Most projects finish sooner.
Deployment checked before the quote
The package includes signing, encryption, decryption and session handling. We verify device-bound keys and server integrity checks during review and document runtime requirements before you commit.
30 days of fixes
Report a defect within 30 days of delivery. We fix any delivered call that does not match the tested APK at no extra cost.