> For the complete documentation index, see [llms.txt](https://guides.regen.network/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://guides.regen.network/technical-documentation/data-access-and-apis/retirement-certificates.md).

# Retirement Certificates

Retirement information is available via the Indexer GraphQL endpoint at `https://api.regen.network/indexer/v1/graphql`. Unlike the Marketplace API, this endpoint does not require CSRF authentication.

**Query by transaction hash:**

graphql

```graphql
query IndexerRetirementByTxHash($txHash: String!) {
  retirementByTxHash(txHash: $txHash) {
    nodeId
  }
}
```

The returned `nodeId` can be used to construct the retirement certificate URL:

```
https://app.regen.network/certificate/{nodeID}
```