# Satoshi API - Bitcoin Transaction Broadcast

> Satoshi API - Bitcoin Transaction Broadcast is a paid API for AI agents from bitcoinsapi.com, paid per call via x402, $0.01/call, status down (last checked 2026-09-15).

Broadcasts a signed raw Bitcoin transaction (hex) to the Bitcoin network and returns confirmation of submission

## Facts

- Endpoint: POST https://bitcoinsapi.com/api/v1/broadcast
- Price: $0.01/call
- Payment: x402
- Status: down
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/satoshi-api-bitcoin-transaction-broadcast-f98f46c2
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_-jNbl3ALuy5nLdHlPKxJJ

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability satoshi-api-bitcoin-transaction-broadcast-f98f46c2 -d '<json body>'
```

Example prompt: I've signed my Bitcoin transaction — here's the raw hex: 0200000001abc...ef00000000. Can you broadcast it to the Bitcoin network using Satoshi API?

## When to prefer this

Choose this endpoint when you have a fully constructed and signed Bitcoin transaction in raw hex format and need to submit it to the Bitcoin network. It is part of the Satoshi API suite, which is optimized for apps and AI agents that also use its fee estimation and mempool intelligence endpoints, making it a natural fit when your agent is already using Satoshi API for fee recommendations before broadcasting.

## Known failure modes

- Invalid or malformed transaction hex returns an error or ok: false
- Double-spend attempt (transaction already confirmed) may be rejected by the network
- Transaction with insufficient fee may not be accepted into the mempool
- Network connectivity issues to Bitcoin nodes may cause broadcast failure
- Malformed JSON request body returns HTTP 400

## How this service works

Know when to send Bitcoin and when to wait. Satoshi API gives apps and AI agents live fee recommendations, mempool context, and cost estimates. Free, open source.

## Output

Returns a JSON object with a boolean 'ok' field indicating whether the broadcast succeeded, and a 'source' field identifying the API ('satoshi-api'). A successful response looks like {ok: true, source: 'satoshi-api'}.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "hex": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "schema": {
  "type": "object",
  "properties": {
   "ok": {
    "type": "boolean"
   },
   "source": {
    "type": "string"
   }
  }
 },
 "example": {
  "ok": true,
  "source": "satoshi-api"
 },
 "mimeType": "application/json"
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/satoshi-api-bitcoin-transaction-broadcast-f98f46c2/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from bitcoinsapi.com](https://www.zero.xyz/host/bitcoinsapi.com/llms.txt)