---
title: "Transaction stake pool registration and update certificates"
method: GET
path: "/txs/{hash}/pool_updates"
tags: ["Cardano » Transactions"]
---

# Transaction stake pool registration and update certificates

`GET /txs/{hash}/pool_updates`

Obtain information about stake pool registration and update certificates of a specific transaction.

## Path parameters

- `hash` string, 64-character case-sensitive hexadecimal string, required

## Response `200`

Obtain information about stake pool certificates of a specific transaction

- object[]
  - `cert_index` integer, required — Index of the certificate within the transaction
  - `pool_id` string, required — Bech32 encoded pool ID
  - `vrf_key` string, required — VRF key hash
  - `pledge` string, required — Stake pool certificate pledge in Lovelaces
  - `margin_cost` number, required — Margin tax cost of the stake pool
  - `fixed_cost` string, required — Fixed tax cost of the stake pool in Lovelaces
  - `reward_account` string, required — Bech32 reward account of the stake pool
  - `owners` string[], required
  - `metadata` object, nullable, required
    - `url` string, nullable, required — URL to the stake pool metadata
    - `hash` string, nullable, required — Hash of the metadata file
    - `ticker` string, nullable, required — Ticker of the stake pool
    - `name` string, nullable, required — Name of the stake pool
    - `description` string, nullable, required — Description of the stake pool
    - `homepage` string, nullable, required — Home page of the stake pool
  - `relays` object[], required
    - `ipv4` string, nullable, required — IPv4 address of the relay
    - `ipv6` string, nullable, required — IPv6 address of the relay
    - `dns` string, nullable, required — DNS name of the relay
    - `dns_srv` string, nullable, required — DNS SRV entry of the relay
    - `port` integer, required — Network port of the relay
  - `active_epoch` integer, required — Epoch in which the update becomes active

## Other responses

- `400` — Bad request
- `403` — Authentication secret is missing or invalid
- `404` — Component not found
- `418` — IP has been auto-banned for extensive sending of requests after usage limit has been reached
- `429` — Usage limit reached
- `500` — Internal Server Error

---

[API](https://skmtc.net/txpipe/apis/blockfrost-io-api-documentation.md) · [All operations](https://skmtc.net/txpipe/apis/blockfrost-io-api-documentation/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/txpipe/blockfrost-io-api-documentation/revisions/4a2f67b16876/schema)