Get 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.

If the provided leaf index is invalid, the nonce will still be returned as zero.

POST /signature-nonce

Get Signature Nonce

cURL

curl --request POST \
  --url https://api.example.com/signature-nonce \
  --header 'Content-Type: application/json' \
  --data '
{
  "leaf_index": "0x1"
}
'

200

{
  "signature_nonce": "0x0"
}

Body

application/json

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.

Example:

"0x1"

Response

200 - application/json

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.

Example:

"0x0"