---
title: "Input Output (@input-output-hk)"
description: "Blockchain research and engineering company."
account: "input-output-hk"
---

# Input Output

Blockchain research and engineering company.

## APIs

13 public APIs with a stored document.
Each links to its markdown overview; the same address with
`/llms.txt` in place of `.md` lists its operations.
Changes across these APIs: https://skmtc.dev/input-output-hk/feed.md

- [Mithril Aggregator Server](https://skmtc.dev/input-output-hk/apis/mithril-aggregator-server.md): Blockchain: fetch Cardano snapshots, stake distributions, certificates and transaction proofs from a Mithril network
- [PgBoss worker](https://skmtc.dev/input-output-hk/apis/pgboss-worker.md)
- [Chain History](https://skmtc.dev/input-output-hk/apis/chain-history.md): Blockchain: look up block and transaction history by hash or address
- [Network Info](https://skmtc.dev/input-output-hk/apis/network-info.md): Blockchain: query stake, lovelace supply, era, ledger tip and protocol and genesis parameters
- [Blockfrost cache service](https://skmtc.dev/input-output-hk/apis/blockfrost-cache-service.md)
- [Projection](https://skmtc.dev/input-output-hk/apis/projection.md)
- [Stake Pool](https://skmtc.dev/input-output-hk/apis/stake-pool.md): Blockchain staking: search stake pools and retrieve pool statistics
- [Tx Submit](https://skmtc.dev/input-output-hk/apis/tx-submit.md)
- [Rewards](https://skmtc.dev/input-output-hk/apis/rewards.md): Loyalty points: look up account balances and transaction history
- [Handle](https://skmtc.dev/input-output-hk/apis/handle.md)
- [Asset](https://skmtc.dev/input-output-hk/apis/asset.md)
- [UTxO](https://skmtc.dev/input-output-hk/apis/utxo.md): Blockchain data: look up unspent outputs by wallet address
- [Server Metadata](https://skmtc.dev/input-output-hk/apis/server-metadata.md)