---
title: "Get Signature Nonce"
method: POST
path: "/signature-nonce"
tags: ["indexer"]
---

# Get Signature Nonce

`POST /signature-nonce`

Returns the current signature nonce for a given World ID based on its leaf index. The nonce is
used to perform on-chain operations for the World ID.

## Request body

- IndexerQueryRequest — Query for the indexer based on a leaf index. Used for getting inclusion proofs and signature nonces.
  - `leaf_index` string, hex, required — The leaf index to query (from the `WorldIDRegistry`). Accepts decimal or `0x`/`0X`-prefixed hex input.

## Response `200`

- IndexerSignatureNonceResponse — Response containing the signature nonce from the indexer.
  - `signature_nonce` string, hex, required — The signature nonce for the account. Serialized as a canonical `0x`-prefixed hex string.

---

[API](https://skmtc.net/worldcoin/apis/world-id-indexer.md) · [All operations](https://skmtc.net/worldcoin/apis/world-id-indexer/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/worldcoin/world-id-indexer/revisions/744f19e75fe2/schema)