---
title: "A2A JSON-RPC (SendMessage v1.0, message/send v0.3): property_lookup for existing API-key accounts"
method: POST
path: "/a2a"
---

# A2A JSON-RPC (SendMessage v1.0, message/send v0.3): property_lookup for existing API-key accounts

`POST /a2a`

## Request

- Base URL: `https://agents.alphaquantlabs.ai`
- URL: `https://agents.alphaquantlabs.ai/a2a`
- Auth: one of:
  - HTTP bearer
  - API key in header `X-API-Key`

## Response `200`

JSON-RPC

## Other responses

- `401`: no or invalid key

---

[API](https://skmtc.dev/alphaquantlabs/apis/aql-propertycheck-property-intelligence-due-diligence-report.md) · [All operations](https://skmtc.dev/alphaquantlabs/apis/aql-propertycheck-property-intelligence-due-diligence-report/llms.txt) · [OpenAPI document](https://skmtc.dev/alphaquantlabs/apis/aql-propertycheck-property-intelligence-due-diligence-report/revisions/97e2fb7774f8?raw)