# IOTA Transaction Builder API

**Canonical:** https://apis.io/apis/iota/iota-transaction-builder-api/  
**Provider:** IOTA — https://apis.io/providers/iota/  
**Base URL:** https://api.mainnet.iota.cafe:443  
**Documentation:** https://docs.iota.org/iota-api-ref

IOTA Transaction Builder API is one of 17 APIs that [IOTA](https://apis.io/providers/iota/) publishes on the [APIs.io](https://apis.io/) network, described by a machine-readable OpenAPI specification. Tagged areas include Transaction Builder. The published artifact set on APIs.io includes an OpenAPI specification, API documentation, and an API reference.

Build unsigned transactions for transfers, staking, Move calls (unsafe_ prefix)

## Machine-readable artifacts (5)

- **OpenAPI** — https://raw.githubusercontent.com/api-evangelist/iota/refs/heads/main/openapi/iota-transaction-builder-api-openapi.yml
- **Documentation** — https://docs.iota.org/iota-api-ref
- **APIReference** — https://docs.iota.org/iota-api-ref
- **Documentation** — https://docs.iota.org/developer/iota-evm/references/json-rpc-spec
- **APIReference** — https://docs.iota.org/developer/iota-evm/references/openapi/ethereum-json-rpc

## Other IOTA APIs (12)

- [IOTA GraphQL API](https://apis.io/apis/iota/iota-graphql-api/)
- [IOTA auth API](https://apis.io/apis/iota/iota-auth-api/)
- [IOTA chains API](https://apis.io/apis/iota/iota-chains-api/)
- [IOTA Coin Query API](https://apis.io/apis/iota/iota-coin-query-api/)
- [IOTA corecontracts API](https://apis.io/apis/iota/iota-corecontracts-api/)
- [IOTA Extended API](https://apis.io/apis/iota/iota-extended-api/)
- [IOTA Governance API](https://apis.io/apis/iota/iota-governance-api/)
- [IOTA Health API](https://apis.io/apis/iota/iota-health-api/)
- [IOTA metrics API](https://apis.io/apis/iota/iota-metrics-api/)
- [IOTA Move Utils API](https://apis.io/apis/iota/iota-move-utils-api/)
- [IOTA node API](https://apis.io/apis/iota/iota-node-api/)
- [IOTA Read API](https://apis.io/apis/iota/iota-read-api/)

## Tags

Transaction Builder

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/iota/iota-transaction-builder-api/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/iota/.