Conversion API - EarnOS Docs

How It Works

A user taps an EarnOS offer link — we generate a click ID and pass it to your platform via your tracking URL template (e.g. sub1, custom_1, aff_sub, etc.)
The user completes an action on your platform (install, purchase, reaches a level, etc.)
Your server sends a postback to your dedicated EarnOS callback endpoint with the click ID and event details
EarnOS validates the postback, matches it to the user, and processes the reward

Your Callback Endpoint

Each provider receives a dedicated endpoint:

https://api.earnos.com/conversion/v1/providers/{your_slug}/callback

Your slug is assigned during onboarding (e.g. ayet, affise, tune). Both GET and POST methods are accepted. The endpoint returns 200 OK immediately — processing happens asynchronously.

{
  "status": "accepted",
  "requestId": "7c9e6679-7425-40de-944b-e07fc1f90ae7"
}

Parameters

Parameters can be sent as query string (GET) or JSON body (POST). The exact parameter names depend on your platform’s adapter — we support aliases for all major networks.

Required

click_id

string

required

The EarnOS click ID provided to you via the tracking URL. Depending on your platform this may be passed as click_id, custom_1, sub1, aff_sub, clickid, or external_identifier.

event_name

string

required

The event type, e.g. install, tutorial_complete, level_achieved_10, purchase. Must match the event names configured for your campaign in EarnOS.

transaction_id

string

required

Your unique transaction/conversion ID for this event. Used for deduplication — sending the same transaction_id twice will be treated as a duplicate. Aliases: event_id, conversion_id, action_id, tid.

Optional

payout_amount

string

Payout amount, e.g. "2.50". Aliases: payout_usd, payout, amount, sum, currency_amount.

payout_currency

string

default:"USD"

ISO currency code. Defaults to USD when payout_usd is used.

occurred_at

string

When the event occurred. Accepts ISO 8601, unix timestamp (seconds or milliseconds). Aliases: callback_ts, datetime, ts, timestamp.

launch_id

string

EarnOS launch tracking ID (provided in your tracking URL template). Aliases: custom_2, launchId, aff_sub2, sub2.

launch_identity

string

EarnOS launch identity (provided in your tracking URL template). Aliases: custom_3, launchIdentity, aff_sub3, sub3.

offer_id

string

Your internal offer/campaign identifier.

status

string

default:"confirmed"

Conversion status. Use is_chargeback=1 or status=reversed to report chargebacks/reversals.

Authentication

Authentication is configured per-provider during onboarding. We support multiple verification methods to match your platform’s capabilities.

HMAC-SHA256 Query Signature (Recommended)

Sign the query string using HMAC-SHA256 with your shared secret. The signature can be sent as a header or query parameter depending on your configuration. Signature computation (sorted query):

const crypto = require('crypto');

// 1. Sort all query params alphabetically (exclude signature param)
const sortedParams = new URLSearchParams(
  [...url.searchParams.entries()]
    .filter(([key]) => key !== 'signature')
    .sort(([a], [b]) => a.localeCompare(b))
);

// 2. Compute HMAC-SHA256
const signature = crypto
  .createHmac('sha256', 'your_shared_secret')
  .update(sortedParams.toString())
  .digest('hex');

// 3. Attach as header or query param (per your config)

API Key

Include your API key as a header or query parameter:

X-Api-Key: your_api_key

HMAC-SHA256 Body Signature

For POST requests with JSON bodies:

X-Signature: HMAC-SHA256(timestamp + "." + body, secret)
X-Timestamp: unix_timestamp

Timestamps must be within 5 minutes of server time.

IP Allowlist

Callbacks are only accepted from your registered IP addresses. No signature required.

Other Methods

We also support Timestamped Token, Affise S2S, and Signed Redirect (including Dynata-specific) verification. Contact your partner manager for configuration details.

Examples

GET — Install Event (Query String)

curl "https://api.earnos.com/conversion/v1/providers/your_slug/callback?\
click_id=550e8400-e29b-41d4-a716-446655440000&\
event_name=install&\
transaction_id=txn_abc123&\
payout_usd=2.00"

POST — Purchase Event (JSON Body)

curl -X POST https://api.earnos.com/conversion/v1/providers/your_slug/callback \
  -H "X-Api-Key: your_api_key" \
  -H "Content-Type: application/json" \
  -d '{
    "click_id": "550e8400-e29b-41d4-a716-446655440000",
    "event_name": "purchase",
    "transaction_id": "order_12345",
    "payout_usd": "5.00"
  }'

Multiple Events (Same Click)

A single click can have multiple events — common for milestone-based offers. Each event needs a unique transaction_id:

# Step 1: Install
curl "https://api.earnos.com/conversion/v1/providers/your_slug/callback?\
click_id=550e8400&event_name=install&transaction_id=txn_install_789&payout_usd=2.00"

# Step 2: Tutorial complete
curl "https://api.earnos.com/conversion/v1/providers/your_slug/callback?\
click_id=550e8400&event_name=tutorial_complete&transaction_id=txn_tutorial_789&payout_usd=3.00"

# Step 3: Reach level 10
curl "https://api.earnos.com/conversion/v1/providers/your_slug/callback?\
click_id=550e8400&event_name=level_achieved_10&transaction_id=txn_level10_789&payout_usd=5.00"

Response

All requests return 200 OK immediately. Processing is asynchronous.

{
  "status": "accepted",
  "requestId": "7c9e6679-7425-40de-944b-e07fc1f90ae7"
}

Duplicate events (same transaction_id) are silently deduplicated — you will still receive a 200 response.

Error Codes

HTTP Code	Error	Meaning	Action
400	`INVALID_CLICK_ID`	Click ID not found or expired	Do not retry
400	`CLICK_PARTNER_MISMATCH`	Click belongs to a different provider	Verify click source
400	`EVENT_NOT_ALLOWED`	Event name not configured for campaign	Contact EarnOS
401	`SIGNATURE_REQUIRED`	No signature provided	Add authentication
401	`INVALID_SIGNATURE`	Signature verification failed	Check secret key
401	`TIMESTAMP_EXPIRED`	Timestamp outside 5-minute window	Sync server clock
404	`PROVIDER_NOT_FOUND`	Unknown provider slug	Verify endpoint URL
503	`SERVICE_UNAVAILABLE`	Temporary error	Retry with backoff

Retry Logic

200: Accepted — do not retry
400: Client error — do not retry (fix the request)
401: Auth error — do not retry (fix credentials)
503: Server error — retry with exponential backoff

Recommended retry schedule: 1s, 5s, 30s, 2min, 10min, 1hr (then alert).

Tracking URL Parameters

During onboarding, EarnOS configures your tracking URL template with the following values in your platform’s sub-parameter slots:

EarnOS Value	Purpose	Common Slot Names
`click_id`	Links the postback to the user	`sub1`, `custom_1`, `aff_sub`, `clickid`
`launch_id`	Tracks the app launch session	`sub2`, `custom_2`, `aff_sub2`
`launch_identity`	Provider-specific launch identity	`sub3`, `custom_3`, `aff_sub3`

Your postback must include at least the click_id value so we can attribute the conversion.

Event Names

Event names are configured per-campaign during onboarding. Common examples:

Event	Description
`install`	App installed / account created
`tutorial_complete`	Completed onboarding tutorial
`level_achieved_10`	Reached level 10
`level_achieved_25`	Reached level 25
`purchase`	Made an in-app purchase
`signup`	Completed registration
`subscription`	Started a subscription

Event names must match exactly as configured. Contact your EarnOS partner manager for the list of events configured for your campaign.

Testing

Verification Checklist

Verify click_id capture: Ensure your tracking template correctly captures the EarnOS click ID
Send test postback: Use a real click_id from a test session
Check response: Confirm you receive 200 OK
Verify in EarnOS: Confirm the conversion appears in the EarnOS dashboard
Test duplicate handling: Send the same postback again — it should be silently deduplicated
Test all event types: Send each configured event name to verify the full flow

FAQ

Q: What’s the attribution window? A: 7 days by default. Postbacks for clicks older than 7 days will be rejected. Q: What happens if I send a duplicate? A: Duplicates are silently deduplicated based on transaction_id. You’ll still receive a 200 response. Q: Can I send multiple events for the same click? A: Yes. Each event needs a unique transaction_id. This is standard for milestone-based campaigns (e.g. install, then tutorial, then level 10). Q: How quickly are rewards processed? A: Postbacks are processed within seconds. Reward payout timing depends on the campaign configuration. Q: Do you support chargebacks/reversals? A: Yes. Send a postback with is_chargeback=1 or status=reversed using the same click_id. This must be enabled for your account.

Support

Integration issues: Contact your EarnOS partner manager
Technical questions: support@earnos.io

​How It Works

​Your Callback Endpoint

​Parameters

​Required

​Optional

​Authentication

​HMAC-SHA256 Query Signature (Recommended)

​API Key

​HMAC-SHA256 Body Signature

​IP Allowlist

​Other Methods

​Examples

​GET — Install Event (Query String)

​POST — Purchase Event (JSON Body)

​Multiple Events (Same Click)

​Response

​Error Codes

​Retry Logic

​Tracking URL Parameters

​Event Names

​Testing

​Verification Checklist

​FAQ

​Support

How It Works

Your Callback Endpoint

Parameters

Required

Optional

Authentication

HMAC-SHA256 Query Signature (Recommended)

API Key

HMAC-SHA256 Body Signature

IP Allowlist

Other Methods

Examples

GET — Install Event (Query String)

POST — Purchase Event (JSON Body)

Multiple Events (Same Click)

Response

Error Codes

Retry Logic

Tracking URL Parameters

Event Names

Testing

Verification Checklist

FAQ

Support