# Hiro

> Hiro Systems PBC builds developer tools and hosted infrastructure for Stacks, the Bitcoin smart-contract layer. Its APIs, Chainhooks event service, Clarinet tooling and Stacks.js libraries help developers test contracts, build applications and access blockchain data.

- **Founded:** 2013
- **Headquarters:** New York, United States
- **Founders:** Muneeb Ali (Co-founder of predecessor Blockstack; Hiro chairman), Ryan Shea (Co-founder of predecessor Blockstack; departed in 2018)
- **Products:** Stacks Blockchain API, Token Metadata API, Chainhooks, Clarinet, Stacks.js
- **Notable:** Predecessor participated in Y Combinator Summer 2014., Converted to a public benefit corporation in 2017., Released Clarinet in 2021 and a hosted developer platform in 2023.

## Products & services

- **Stacks Blockchain API** — Hosted, open-source blockchain data interface for transactions, account balances, contract queries and transaction broadcasting. Free access expansion is scheduled for October 30, 2026.
- **Token Metadata API** — Provides names, symbols, images, supply and NFT metadata for Stacks assets.
- **Chainhooks** — Hosted event subscriptions for Stacks applications; v2 replaces the earlier backend and supports API-based management.
- **Clarinet** — Local Clarity smart-contract development, testing, debugging and deployment tools; the public repository now resolves to stx-labs.
- **Stacks.js** — JavaScript libraries for Stacks application development and transactions; the public repository now resolves to stx-labs.
- **Hiro Platform** — Launched in 2023 as a browser-based development environment. Scheduled to narrow to API key management on October 30, 2026.
- **Stacks Explorer** — Public interface for inspecting Stacks blocks, transactions, accounts and contracts.

## Achievements

- Predecessor participated in Y Combinator Summer 2014.
- Converted to a public benefit corporation in 2017.
- Released Clarinet in 2021 and a hosted developer platform in 2023.
- Reported 750M+ monthly API requests across services in April 2025.
- SEC staff informed Hiro on July 9, 2024 that the investigation was concluded without a recommendation for enforcement action.

## Latest updates

- **2026-09** — Announced free Stacks API access and a simpler Platform, effective October 30, 2026.
- **2026-02** — Chainhooks v2 general availability and March 9 retirement of hosted v1 announced.
- **2026-02** — Announced March 9 retirement of Ordinals, Runes, BRC-20 APIs and Bitcoin Indexer, with Xverse migration guidance.
- **2025-11** — Chainhooks 2.0 beta introduced after a backend redesign.

## Links

- Website: https://www.hiro.so/
- LinkedIn: https://www.linkedin.com/company/hiro-systems
- Twitter/X: https://twitter.com/hirosystems
- GitHub: https://github.com/hirosystems
- YouTube: https://www.youtube.com/c/HiroSystems

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Profile page: https://yespress.io/hiro
Published by YesPress — https://yespress.io
Last updated: 2026-10-04