---
title: "POST /transactions"
method: POST
path: "/transactions"
tags: ["external", "transaction"]
---

# POST /transactions

`POST /transactions`

Post a new transaction

## Request body

- Tx
  - `tx` string, required — Base64Check encoded tagged byte array

## Response `200`

Successful operation

- PostTxResponse
  - `tx_hash` string, required — Base58Check encoded tagged hash

## Other responses

- `400` — Invalid transaction
- `503` — The node is temporarily unable to handle the request: either its request queues are saturated (overload protection) or it has not yet reached a stable mode. Overload protection is applied to every endpoint, so this response can be returned by any operation. The Retry-After header tells the client how long to back off before retrying.

## Changes

- **2026-07-27** `ca5dd7bf8408` — 1 info
  - added the non-success response with the status `503`

[Change history](https://skmtc.dev/aeternity/apis/aeternity-node/changes/transactions/post.md)

---

[API](https://skmtc.dev/aeternity/apis/aeternity-node.md) · [All operations](https://skmtc.dev/aeternity/apis/aeternity-node/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/aeternity/aeternity-node/revisions/597a254980b2/schema)