# 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}
```


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# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://guides.regen.network/technical-documentation/data-access-and-apis/retirement-certificates.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.