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Zerion API - Update TX Subscription Callback URL
x402
Zerion API - Update TX Subscription Callback URL is a paid API for AI agents from api.zerion.io, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-21).
Updates the callback URL for an existing blockchain transaction subscription by subscription ID
Price / call$0.01
Success—
StatusUnknown
How this service works
Interpreted wallet data for more than 40 chains and Solana: portfolios, DeFi positions, PnL, transactions and NFTs. REST for apps, x402 pay-per-call for agents.
Output
Returns the updated transaction subscription object confirming the new callback URL has been saved, including the subscription ID and updated callback_url field.
Example use cases
Redirect webhook after server migration
“My backend just moved to a new server — update the callback URL on Zerion subscription sub_xyz789 to https://new-server.myapp.com/callbacks/transactions.”
Fix broken transaction notification endpoint
“The webhook URL on my transaction subscription sub_def456 is returning 404s — change the callback URL to https://api.myapp.io/v2/zerion-hooks so alerts start flowing again.”
Switch tx alerts to staging environment
“I want to reroute my Zerion tx subscription sub_stg999 callbacks to https://staging.myapp.com/tx-events while I test my new transaction handler.”
Technical details
Endpoint
PATCHhttps://api.zerion.io/v1/tx-subscriptions/%7Bsubscription_id%7D/callback_url?utm_source=zero.xyzWhen to prefer
Use this endpoint when you have an existing Zerion transaction subscription and need to change where notifications are delivered — such as after a server migration, endpoint refactor, or environment switch. Prefer this over deleting and recreating the subscription to preserve the subscription ID and avoid missing any in-flight notifications.
Side effects
- subscription_id not found — 404 if the subscription does not exist or belongs to a different account
- invalid callback URL format — 400 if the URL is malformed or not HTTPS
- unauthorized — 401 if API key is missing or invalid
- payment required — 402 if x402 payment is not provided or USDC balance insufficient
- rate limiting — 429 if too many requests in a short window
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object |
Tags
x402
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