# LiquProp API - Upload Property Document

> LiquProp API - Upload Property Document is a paid API for AI agents from api.relai.fi, paid per call via x402, $0.010000/call, status unknown (last checked 2026-09-15).

Upload a document file (multipart/form-data) to attach to a specific property record in the LiquProp platform

## Facts

- Endpoint: POST https://api.relai.fi/relay/1776502063891/v1/properties/{id}/documents
- Price: $0.010000/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/liquprop-api-01fa7508
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_HnKJ0f7ym6fWbcmYMdhR1

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 liquprop-api-01fa7508 -d '<json body>'
```

Example prompt: Upload this lease agreement PDF to property ID 4821 in LiquProp so it's attached to that property's document record.

## When to prefer this

Use this endpoint when you need to attach or upload a file/document to an existing property record in the LiquProp system. Prefer this over the periodic report endpoint when the content is a general document (deed, title, contract, image) rather than a structured periodic report.

## Known failure modes

- Invalid or non-existent property ID returns 404
- Malformed multipart/form-data request returns 400
- File too large or unsupported file type returns 422
- Payment of 0.01 USDC not provided or failed returns 402
- Unauthorized access to property returns 403

## How this service works

Upload a document for a property (multipart/form-data)

## Output

A confirmation response indicating the document was successfully uploaded and associated with the specified property, likely including a document ID and metadata about the stored file.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/liquprop-api-01fa7508/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.relai.fi](https://www.zero.xyz/host/api.relai.fi/llms.txt)