Accountants: get your clients' customer bases ready for French e-invoicing

On 1 September 2027, French SMEs and micro-businesses will issue their invoices electronically, and the customer's SIREN becomes a mandatory mention on the invoice. The question reaches the accounting firm: is this client's customer base ready? Sirenic answers it from public registers. Submit the base, every line comes back at its rank with what the registers say, their source and their date; an ambiguous line comes back to confirm, and nothing is chosen for you.

See a real response (free) Get the quote for /v1/identite/lot

What Sirenic reads for each customer

For each line of the file, Sirenic reads:

• identity in the Sirene register: the SIREN, the head-office SIRET and the status, active or ceased, with the cessation date when it is published;
• VAT: the number computed from the SIREN and its VIES status at the time of the call;
• insolvency proceedings published in the BODACC, newest first;
• on request, the default-risk score and its scorecard, outside the free quota;
• for every answer, the source and the date of each piece of data.

A name is resolved only when a single company bears it at that postcode. Otherwise the line comes back to confirm, with its candidates, or not found: never a silent choice. The line-by-line reading is detailed on the page "Get your customer base ready for e-invoicing".

What Sirenic does not do

• Sirenic is not an accredited e-invoicing platform: it registers nothing in the e-invoicing directory and sends no invoice. It prepares the base.
• Registers are read as published: what a register has not published yet is not there.
• A VIES that does not answer gives indisponible, never invalide. In French business hours, VIES serves one verdict every 4 to 5 seconds: in a batch, part of the numbers comes back non_verifie, to be checked one by one.
• In the BODACC, no notice does not prove no proceedings when the reading is incomplete: the answer says so.
• A sole trader is never served by name or address, and Sirenic never chooses between two namesakes.

Three steps

• Submit the base. Download the template (CSV or spreadsheet) and paste the client's customer export: one line per customer, the SIREN when you have it, otherwise the name and head-office postcode. Create your free key, with an e-mail address and no card. Then have the file read: paste it in Claude with the Sirenic connector, or call the API with your key, from n8n or Make.
• Read the results. Every line comes back at its rank: resolution, SIREN, status, VAT number and its status, insolvency proceedings, reading date. The possible values of each column are in the template's "Lisez-moi" sheet (the template is in French).
• Monitor. Read what changed at a customer since a date, in the BODACC: one call per customer, within the free quota. Daily monitoring of a list, with a signed webhook or an e-mail digest, is paid per customer and per duration.

What is free

A Sirenic account, opened with an e-mail address and no card, gets 150 free calls a month on 106 of 122 routes (the price list says which). The identity batch is included up to 50 lines per call: 50 customers read in one call, no credit debited. Checking a VAT number, a customer's insolvency notices and its changes since a date are included too, one call each.

Outside the quota: an identity batch above 50 lines, the default-risk score, batch KYB and daily monitoring. They are paid with prepaid credits, whose card top-up is not open yet, or per call over x402 (USDC or EURC). A refused or failed call is never billed.

The file template

The "base clients prête" template has three columns for you (siren, denomination, code_postal) and eight that Sirenic fills (resolution, siren_sirenic, etat, tva, tva_vies, procedure, score, date_lecture). It holds no customer data: its example lines are public companies, an invented name and a SIREN with a wrong check digit.

Links: base-clients-prete.csv and base-clients-prete.xlsx.

Create my free key

In Excel, open the CSV through Data, then From Text, and set the siren and code_postal columns to text: otherwise a SIREN or postcode starting with 0 loses its zero. The spreadsheet already has these columns as text.

How you pay

Every route is paid per call, in USDC or EURC on the Base network, over the x402 protocol: no account to create, no API key, no subscription. The first call returns a 402 quote your client settles, then replays the call. A failed call is never billed.

Open today: 150 free calls a month with an account, on 106 of 122 routes (the price list says which), and pay-per-call over x402 (USDC or EURC), with no account except registry filings. Prepaid credits: card top-up is not open yet.

Paid responses are Ed25519-signed: you can later prove what was served to you, and when. The whole catalogue is free to read in the OpenAPI document and in llms.txt.

One call, end to end

# x402 client (npm): the 402 quote is settled and the call replayed automatically
npx x402-fetch https://api.sirenic.eu/v1/entreprise/552032534

# Or over MCP, in Claude Code / Cursor
claude mcp add --transport http sirenic https://api.sirenic.eu/mcp

# Or as a local server (stdio), with your key or an x402 wallet
claude mcp add sirenic -e SIRENIC_API_KEY=srn_live_... -- npx -y sirenic-mcp

Routes used and pricing

The default-risk score is a decision-support indicator. It is neither a solvency opinion nor a credit rating in the regulatory sense, and it guarantees no payment.

Frequently asked questions

How many customers does the free quota cover?

A 50-line batch counts as one call; reading the insolvency notices then counts one call per customer, as does each VAT number to check again. A 50-customer base read in full therefore fits in the month's 150 calls.

The base includes sole traders: does it work?

By SIREN, yes: the line comes back with its status, the head-office SIRET and the VAT number, without name or address. By name, no: a person's name is never resolved.

Take it further

No account to create, no key to request: the first step is free and shows you exactly what you would be buying.

See a real response (free) Get the quote for /v1/identite/lot Read the route reference Create an account: 150 free calls a month

Read next

• Get your customer base ready for e-invoicing
• Validate an intra-community VAT number
• Detecting insolvency proceedings
• Know what changed at a customer since your last contact
• Monitoring a portfolio of customers or suppliers
• Assessing a customer's default risk

OpenAPI · llms.txt · Full route catalogue and pricing