Cardano · Altruistic Collateral

Shared collateral, signed on demand.

Build a transaction that uses this provider's collateral UTxO and PKH, POST the CBOR, and get back a vkey witness to attach before submitting on chain. No wallet collateral, no Blockfrost key, no full node required.

Required Signer Hash

Add this PKH to your transaction's required_signers field. It must match the entry under your chosen network in known_hosts — verify before signing.

1108b97f2e199d58a0c0697d25412d0fb14d354dcd39654b9eb0dec8

Available Networks

Pick the network your transaction targets and POST its CBOR to the matching endpoint.

preprod Test
Endpoint https://www.giveme.my/preprod/collateral/
UTxO ef18e00c412c06b74606c5e68901693c3974b2073dbec1dfd8b74f01af3102a1#0
mainnet Live
Endpoint https://www.giveme.my/mainnet/collateral/
UTxO 1c2fbce4e3974f721b27226645c7a35d648698c77f62bc337b40bc2cd294e9cd#0

Quick start

Send the transaction CBOR; receive the vkey witness. Attach it to your tx's witness set, then submit through your usual node or relay. 

curl -X POST https://www.giveme.my/preprod/collateral/ \
     -H 'Content-Type: application/json' \
     -d '{ "tx": "<hex cbor>" }'

Response

{ "witness": "8200825820<pubkey>5840<signature>" }

Resources