# VelumX

## Docs

- [Batch Broadcast](https://docs.velumx.xyz/api-reference/endpoint/batch.md): Sponsor and broadcast up to 25 transactions in a single API call
- [Broadcast](https://docs.velumx.xyz/api-reference/endpoint/broadcast.md): Co-sign and broadcast a raw Stacks sponsored transaction hex. The target network (mainnet or testnet) is determined automatically from the transaction's version byte (`0x00` = mainnet, `0x80` = testnet) — no `network` field is needed or accepted. `feeToken` is also not required here; the relayer int…
- [Get Project Config](https://docs.velumx.xyz/api-reference/endpoint/config.md): Fetch the supported gas tokens and sponsorship policy for the authenticated API key.
- [Estimate Fee](https://docs.velumx.xyz/api-reference/endpoint/estimate.md): Calculate the required fee in a specific SIP-010 token for a transaction intent.
- [Sponsor Intent](https://docs.velumx.xyz/api-reference/endpoint/sponsor.md): Submit a signed transaction intent for sponsorship via the v5 Universal Paymaster.
- [Introduction](https://docs.velumx.xyz/api-reference/introduction.md): API Reference for the VelumX Relayer
- [Economics](https://docs.velumx.xyz/architecture/economics.md)
- [Paymaster pattern](https://docs.velumx.xyz/architecture/paymaster-pattern.md)
- [Transaction lifecycle](https://docs.velumx.xyz/architecture/transaction-lifecycle.md)
- [Concepts](https://docs.velumx.xyz/essentials/concepts.md)
- [Getting started](https://docs.velumx.xyz/essentials/getting-started.md)
- [Introduction](https://docs.velumx.xyz/essentials/introduction.md)
- [Testnet](https://docs.velumx.xyz/essentials/testnet.md)
- [Throttling](https://docs.velumx.xyz/infrastructure/throttling.md)
- [Contract directory](https://docs.velumx.xyz/reference/contract-directory.md)
- [Security compliance](https://docs.velumx.xyz/reference/security-compliance.md)
- [Reference](https://docs.velumx.xyz/sdk/reference.md)
- [Sponsorship models](https://docs.velumx.xyz/solutions/sponsorship-models.md)

## OpenAPI Specs

- [openapi](https://docs.velumx.xyz/api-reference/openapi.json)