The Fonciq API for the Quebec land registry
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Use case · Proptech
Land registry and cadastre for property platforms
Your platform starts from an address and wants a lot number, the cadastre, the roll assessment, then, when needed, the index and the plan. The Fonciq API chains those calls and tells you when a lot changes.
What your team integrates
The calls that matter for this use case
From address to lot
An address or a matricule becomes a lot number, with the cadastre and the matricule, and a flag saying whether the assessment roll corroborates the lot.
GET /v1/lots/resolve
The lot record
The cadastre, the roll assessment in cents and the index rows already kept, as JSON or CSV.
GET /v1/lots/{lot}
A portfolio of lots
Up to 500 lots per request for a portfolio, with the result as JSON or CSV.
POST /v1/batches
Changes on a lot
A signed webhook when a filing is added, or when the cadastre or the roll assessment changes.
POST /v1/watches
How it works
What to know before integrating
- Address, cadastre and roll reads do not consult the Registre: CAD 0.99 per call excluding Registre fees. The index and the plan consult the Registre, which bills the account holder CAD 1.50.
- Orders to the Registre run on the organisation’s Registre account, with a cap of 540 indexes per day per account.
- The 20 public datasets are available in Studio. The API reads only one of them today, the municipal assessment rolls, besides the orders to the Registre.
- A watch re-checks a lot on a schedule (daily or weekly): the Registre foncier has no push feed. Creating one costs CAD 0.99 excluding Registre fees; each index consulted afterwards is another call, with CAD 1.50 at the Registre.
Pricing and caps
CAD 0.99 per call, excluding Registre fees
One consulted index costs CAD 2.49: CAD 0.99 excluding Registre fees, plus the Registre’s own CAD 1.50 fee, billed by the Registre to the account holder.
| Call | Fonciq | Registre fee |
|---|---|---|
| Index — POST /v1/registre/requests | 0.99 CAD excluding Registre fees | 1.50 CAD, always (the Registre is consulted on every call). Index consulted: 2.49 CAD in total. |
| Deed PDF — POST /v1/actes | 0.99 CAD excluding Registre fees | 1.50 CAD only when the call consults the Registre. A deed Fonciq already holds: 0 CAD. |
| Cadastral plan — POST /v1/plans | 0.99 CAD excluding Registre fees | 1.50 CAD only when the call consults the Registre. A plan Fonciq already holds: 0 CAD. |
| Lot: resolve and record — GET /v1/lots/resolve, GET /v1/lots/{lot} | 0.99 CAD excluding Registre fees | None: these calls read the municipal assessment rolls and do not consult the Registre. |
| Batches — POST /v1/batches | 0.99 CAD per index excluding Registre fees | 1.50 CAD per index consulted. |
| Watch — POST /v1/watches | 0.99 CAD excluding Registre fees | Each index re-checked afterwards is a separate call: 0.99 CAD excluding Registre fees, plus 1.50 CAD at the Registre. |
| Structured deed reading | 4.99 CAD — Coming later | Not available yet: not billable and not in the OpenAPI document. |
A fq_test_ key charges nothing. Registre fees (1.50 CAD per document) are billed by the Registre to the account holder, with no Fonciq margin. Source: Registre foncier rate sheet in force from 1 April 2026.
- 60 requests per minute per key.
- 540 index calls per day per Registre account.
- 500 lots per batch request.
Limits
What the API does not do
- Structured deed reading (CAD 4.99) is coming later: it is neither available nor billed.
- The other public datasets have no API call: they are read in Studio.
- An organisation can have at most 25 active watches.
Get started
One key, then the organisation’s Registre account
A fq_test_ key charges nothing.
Create a key →API reference (in French)
Law 25: designated privacy officer (RPRP) · Requests answered within 30 days · Client data hosted in Québec · AI processing in Montréal. Privacy policy (French)
Fonciq is not affiliated with the Registre foncier du Québec or its suppliers.
Frequently asked questions
Short answers.
- Can a lot be found from an address programmatically?
- Yes: GET /v1/lots/resolve takes an address or a matricule and returns the lot, the cadastre and the matricule. Each call costs CAD 0.99 excluding Registre fees and does not consult the Registre.
- Is there a Quebec cadastral data API?
- A lot record in the Fonciq API brings together the cadastre, the roll assessment and the index rows, and the API orders the cadastral plan. The Registre foncier has no API of its own: the Fonciq API is Fonciq’s.
- How do I get webhooks for new registrations on a lot?
- With a watch: a signed webhook is sent when a filing is added, or when the cadastre or the roll assessment changes.