brevo_api

A pure Dart client for the Brevo API (formerly Sendinblue). Runs on Dart servers, CLIs and Flutter apps — there is no Flutter dependency, and no code generation step for you.

Used in production at Fullphysio, where it runs inside our Dart Cloud Functions. Bug reports are welcome — see CONTRIBUTING.md.

final brevo = BrevoClient(apiKey: apiKey);

final sent = await brevo.transactionalEmails.sendTransacEmail(
  SendTransacEmailRequest(
    templateId: 42,
    to: [SendTransacEmailRequestToItem(email: 'ada@example.com')],
    params: {'FIRSTNAME': 'Ada'},
  ),
);
print(sent.messageId);

final contact = await brevo.contacts.getContactInfo(identifier: 'ada@example.com');
print(contact.listIds);

Why this exists

No Dart package covers the Brevo REST API. This package is a port of the official Node.js client, @getbrevo/brevo: the runtime — transport, retries, error mapping, query and path encoding, body serialisation — is a hand port verified against fixtures captured from the real client, and every model and resource method is generated from Brevo's own OpenAPI specification by a generator that lives in this repository. Following a Brevo release is a command, not a rewrite.

Usage

Every one of the 34 Brevo resources hangs off the client under the name the Node.js client uses, so Brevo's own documentation applies: brevo.contacts, brevo.transactionalEmails, brevo.transactionalSms, brevo.emailCampaigns, brevo.senders, brevo.webhooks, brevo.companies, brevo.deals, brevo.ecommerce, brevo.event, brevo.masterAccount, …

Path and query parameters are named arguments; a request body is a typed positional object. Every method takes an optional options argument for a per-call timeout, retry budget or extra headers.

Resources hang off the client through an extension, so they are reachable wherever package:brevo_api/brevo_api.dart is imported. Re-exporting BrevoClient from your own façade means re-exporting this library with it, or client.contacts will not resolve at the call site.

await brevo.contacts.updateContact(
  UpdateContactRequest(attributes: {'FIRSTNAME': 'Ada', 'PLAN': 'pro'}),
  identifier: 'ada@example.com',
);

final campaigns = await brevo.emailCampaigns.getEmailCampaigns(
  status: GetEmailCampaignsRequestStatus.sent,
  limit: 20,
  options: const BrevoRequestOptions(timeout: Duration(seconds: 10)),
);

Pagination

Brevo paginates with limit / offset and reports a count. Every list that does has a …Paged twin returning a BrevoOffsetPage:

final page = await brevo.contacts.getContactsPaged(limit: 500, listIds: [7]);
await for (final contact in page.autoPaging()) {
  print(contact.email);
}

Files

The three upload endpoints take a BrevoFile:

await brevo.companies.importCompaniesCreationAndUpdation(
  PostCompaniesImportRequest(
    file: BrevoFile(bytes: csvBytes, filename: 'companies.csv', contentType: 'text/csv'),
    mapping: {'name': 'company_name'},
  ),
);

Escape hatch

brevo.requestJson, requestVoid, requestBytes and requestMultipart reach any endpoint this package does not model yet, with the same authentication, retries and error mapping.

Models

Response models decode tolerantly: a field Brevo omits, renames or retypes reads as null (or an empty list), never throws, and the whole payload stays available as .raw. Timestamps are kept as the strings Brevo sends, with a …Date getter that parses them. Enums are open: CampaignStatus.fromWire('new') returns a value with isKnown == false instead of failing, so a Brevo release never breaks decoding. Request bodies honour the specification's required fields at the constructor.

Errors

Every failure is a BrevoException, a sealed hierarchy:

Exception	When
BrevoBadRequestException … BrevoTooManyRequestsException, BrevoInternalServerException	a 400, 401, 402, 403, 404, 405, 409, 412, 415, 417, 422, 424, 425, 429 or 5xx response, with Brevo's code and errorMessage
BrevoUnexpectedStatusException	any other non-2xx status
BrevoConnectionException, BrevoTimeoutException	the request never produced a response

BrevoDecodeException (outside the hierarchy) means Brevo answered successfully but the payload was not JSON, or not the object or list the operation returns.

Fidelity to @getbrevo/brevo

This client reproduces @getbrevo/brevo 6.0.3's observable behaviour, including details that are easy to get subtly wrong:

• Retries on 408, 429 and 5xx — twice by default — honouring Retry-After (seconds or a date), then X-RateLimit-Reset, then a 1 s-doubling backoff capped at 60 s with ±10 % jitter. A connection failure or timeout is not retried, as upstream. Brevo defines no idempotency keys, so a retried POST is exactly as eager as upstream.
• Query arrays repeat the key, ids=1&ids=2; keys and values are encoded like encodeURIComponent. A null field of a request body is omitted, exactly as JSON.stringify drops undefined.
• Error messages follow the Status code: 400 / Body: {…} layout upstream prints, with the body decoded as JSON only under a JSON content type.

Conformance is enforced by golden tests whose fixtures — request URLs and bodies, error messages, and which statuses are retried and how often — were captured from the real @getbrevo/brevo rather than written by hand. The length of each backoff is the exception: the captures pin the retry decisions, while the 60 s cap and the jitter are covered by unit tests written against upstream's implementation. A mock-server tier then calls all 291 operations against WireMock loaded with Brevo's own mappings, checking each one's request against the server's journal.

Scope

Covered. Every operation of the Brevo v3 specification — 291 operations across 34 resources, with typed parameters, request bodies, response models and open enums generated from it — plus offset pagination helpers and multipart uploads.

Not covered. Inbound webhook payload models (Brevo does not sign webhooks; parse deliveries with jsonDecode) and the OAuth / custom authentication hooks of the Node.js client.

Deliberate divergences from @getbrevo/brevo

• Nothing is read from environment variables; the API key is always explicit.
• Futures instead of HttpResponsePromise; the raw JSON is one requestJson call away.
• The exception subtype is chosen by status code for every operation, where upstream types only the statuses the specification lists per operation.
• partnerKey is a constructor option sent as the partner-key header, which the specification defines and the Node.js client lacks.
• Undiscriminated oneOf request bodies (adding contacts to a list by emails, ids or extIds, say) are one class with every alternative's fields optional, rather than a union type.
• No X-Fern-* headers; the User-Agent is brevo_api/<version> (Dart).