BLS-to-execution credential changes

curl --request GET \
  --url 'https://beaconcha.in/api/v1/validator/{indexOrPubkey}/blsChange?apikey='

{
  "status": "OK",
  "data": [
    {
      "epoch": 200820,
      "slot": 6426248,
      "blockroot": "0x387e15e80bfce46c2217cd149ec0a03a5f82ce393de12936ca243e076517148b",
      "validatorindex": 20,
      "bls_pubkey": "0x8b84918f955498cd0f6f44537cd0745d29ceffe16a37a353da746ad6879ec1c5992520708aad13b2333ce562faef083c",
      "bls_signature": "0xb735398d821c5eb6356c71e35d59dd29ee56429d03dd443746d3de1bffb9049ed1bd45ab115de42ee3c6d0b69017d9b11413e1c7a0640553c14f8d2076369d51301720f3861c9b824a8a486d116c9bfe38c53747b33d3f1e664ce5ead157ec16",
      "address": "0x23a64e36ae03d85a6121e55e48f6b8eb63d72f76",
      "withdrawalcredentials_0x00": "0x009081da37d4f11d87592b89734db953de64fcb381436b235551b209f3fac343",
      "withdrawalcredentials_0x01": "0x01000000000000000000000023a64e36ae03d85a6121e55e48f6b8eb63d72f76"
    }
  ]
}

Validators

BLS-to-execution credential changes

Retrieve on-chain BLS-to-execution credential change messages (EIP-4881 style) for one or more validators. Each item includes the slot and epoch of inclusion, the canonical block root, the validator’s BLS pubkey and signature over the change message, the original 0x00 withdrawal credentials, and the resulting 0x01 credentials (derived from the execution address). Provide validator identifiers as a comma-separated list in the path. The service accepts validator indices and 0x-prefixed BLS pubkeys (up to the server-enforced limit; default 100). If a provided pubkey does not resolve to a known validator index, the request fails with HTTP 400.

GET

/

api

/

v1

/

validator

/

{indexOrPubkey}

/

blsChange

BLS-to-execution credential changes

curl --request GET \
  --url 'https://beaconcha.in/api/v1/validator/{indexOrPubkey}/blsChange?apikey='

{
  "status": "OK",
  "data": [
    {
      "epoch": 200820,
      "slot": 6426248,
      "blockroot": "0x387e15e80bfce46c2217cd149ec0a03a5f82ce393de12936ca243e076517148b",
      "validatorindex": 20,
      "bls_pubkey": "0x8b84918f955498cd0f6f44537cd0745d29ceffe16a37a353da746ad6879ec1c5992520708aad13b2333ce562faef083c",
      "bls_signature": "0xb735398d821c5eb6356c71e35d59dd29ee56429d03dd443746d3de1bffb9049ed1bd45ab115de42ee3c6d0b69017d9b11413e1c7a0640553c14f8d2076369d51301720f3861c9b824a8a486d116c9bfe38c53747b33d3f1e664ce5ead157ec16",
      "address": "0x23a64e36ae03d85a6121e55e48f6b8eb63d72f76",
      "withdrawalcredentials_0x00": "0x009081da37d4f11d87592b89734db953de64fcb381436b235551b209f3fac343",
      "withdrawalcredentials_0x01": "0x01000000000000000000000023a64e36ae03d85a6121e55e48f6b8eb63d72f76"
    }
  ]
}

Authorizations

apikey

string

query

required

Path Parameters

indexOrPubkey

string

required

Comma-separated validator indices and/or public keys (maximum 100 items by default). Comma-separated list (no spaces) of validator identifiers. Each identifier must be either:

A validator index as a base-10 integer (for example, 652648)
A BLS public key as a 96-hex-character string with or without the 0x prefix (case-insensitive)

Resolution and limits:

The server resolves public keys to validator indices before querying data.
The total number of identifiers must not exceed the server-enforced limit (default 100).
Identifiers that cannot be parsed or resolved result in HTTP 400.

Example:

"1,2,3"

Response

Matching BLS credential changes were retrieved successfully. The data array contains one entry per observed change event.

Standard success envelope used by all API endpoints.

status

enum<string>

HTTP-independent status of the API operation. For successful responses this is always "OK".

Available options:

OK

data

object[]

Response payload specific to the endpoint.

Show child attributes

Validator balance history

Validator deposits (execution layer)