# Saylor Innovations Bitcoin Transaction Lookup

> Saylor Innovations Bitcoin Transaction Lookup is a paid API for AI agents from saylorinnovations.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-13).

Fetches detailed Bitcoin transaction data including confirmations, block info, fee, fee rate, inputs, and outputs by transaction ID

## Facts

- Endpoint: GET https://saylorinnovations.com/api/btc/tx/:txid?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/saylor-innovations-bitcoin-transaction-lookup-0f0433d3
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_AGEcH3zN7asnGSaFLHw94

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 saylor-innovations-bitcoin-transaction-lookup-0f0433d3
```

Example prompt: Can you look up the Bitcoin transaction with txid 4a5e1e4baab89f3a32518a88c31bc87f618f76673e2cc77ab2127b7afdeda33b and tell me if it's confirmed, what block it landed in, and how much was paid in fees?

## When to prefer this

Use this endpoint when you need structured, fee-inclusive Bitcoin transaction details from a single txid lookup, especially when you need fee rate, block confirmation status, and input/output counts in one call. Prefer this over raw blockchain node RPC when you want a simple REST API with a flat JSON response. Suitable for payment verification, fee auditing, and on-chain analytics workflows.

## Known failure modes

- Invalid txid format (not 64 hex characters) — likely returns error or found=false
- Transaction not yet broadcast or not indexed — returns found=false
- Unconfirmed mempool transaction — confirmed=false, block fields null
- Network or upstream data source unavailable — server error response
- Malformed txid (wrong length or non-hex characters) — request rejection

## How this service works

Bitcoin transaction details - confirmations, block, fee and fee rate, inputs and outputs

## Output

Returns a JSON object with: found (boolean), confirmed (boolean), txid, block height, block time, transaction size in bytes, weight, fee in satoshis, fee rate in sat/vbyte, number of inputs, number of outputs, total output BTC, and the data source. Returns found=false if the txid does not match any known transaction.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method",
    "pathParams"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "POST",
      "PUT",
      "PATCH",
      "DELETE",
      "HEAD"
     ],
     "type": "string"
    },
    "pathParams": {
     "type": "object",
     "required": [
      "txid"
     ],
     "properties": {
      "txid": {
       "type": "string",
       "description": "transaction id, 64 hex chars (path)"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "json"
    },
    "example": {
     "type": "object",
     "required": [
      "found"
     ],
     "properties": {
      "txid": {
       "type": [
        "string",
        "null"
       ]
      },
      "found": {
       "type": "boolean",
       "description": "True when the lookup matched a record"
      },
      "source": {
       "type": [
        "string",
        "null"
       ],
       "description": "Data source the values come from"
      },
      "weight": {
       "type": [
        "number",
        "null"
       ]
      },
      "outputs": {
       "type": [
        "array",
        "null"
       ]
      },
      "fee_sats": {
       "type": [
        "number",
        "null"
       ],
       "description": "Fee sats"
      },
      "confirmed": {
       "type": "boolean"
      },
      "block_time": {
       "type": [
        "string",
        "null"
       ],
       "description": "Block time (UTC unless a time zone is given)"
      },
      "size_bytes": {
       "type": [
        "number",
        "null"
       ],
       "description": "Size, in bytes"
      },
      "input_count": {
       "type": [
        "number",
        "null"
       ],
       "description": "Number of input"
      },
      "block_height": {
       "type": [
        "number",
        "null"
       ],
       "description": "Block height"
      },
      "output_count": {
       "type": [
        "number",
        "null"
       ],
       "description": "Number of output"
      },
      "fee_rate_sat_vb": {
       "type": [
        "number",
        "null"
       ],
       "description": "Fee rate sat vb"
      },
… (truncated)
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/saylor-innovations-bitcoin-transaction-lookup-0f0433d3/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from saylorinnovations.com](https://www.zero.xyz/host/saylorinnovations.com/llms.txt)