/v1/validator/sync_committee_contribution

Requests that the beacon node produce a sync committee contribution.

Return 503 if the block identified by the response beacon_block_root is optimistic (i.e., the contribution refers to a block not fully verified by an execution engine).
Return 404 if no sync committee contribution is available for the requested beacon_block_root.

Requests that the beacon node produce a sync committee contribution. - Return **503** if the block identified by the response `beacon_block_root` is optimistic (i.e., the contribution refers to a block not fully verified by an execution engine). - Return **404** if no sync committee contribution is available for the requested `beacon_block_root`.

Query parameters

slotstringRequired

The slot for which a sync committee contribution should be created.

subcommittee_indexstringRequired

The subcommittee index for which to produce the contribution.

beacon_block_rootstringRequiredformat: "hex"

The block root (hex) for which to produce the contribution.

Response

Success response

dataobject or null

1	curl -G https://eth-mainnetbeacon.g.alchemy.com/v2/docs-demo/eth/v1/validator/sync_committee_contribution \
2	-d slot=1 \
3	-d subcommittee_index=1 \
4	-d beacon_block_root=0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2

1	{
2	"data": {
3	"slot": "1",
4	"beacon_block_root": "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
5	"subcommittee_index": "1",
6	"aggregation_bits": "0xffffffffffffffffffffffffffffffff",
7	"signature": "0x1b66ac1f...71505"
8	}
9	}