Technology pageAPI · RESTTier 2

API Platform

The PHP standard for exposing robust REST and GraphQL APIs, built on Symfony, designed for enterprise.

The topicWhat we're talking about

API Platform is the reference framework for exposing REST and GraphQL APIs in PHP. Built on Symfony, it automates everything repetitive in creating a modern API: OpenAPI documentation generation, input validation, serialization, security, pagination, filtering. For an SMB that needs to expose an API consumed by a frontend, mobile, or partners, it's today the most mature and defensible PHP option.

My opinionMy owned point of view

My take on API Platform: it's the tool I deploy when you need to expose your business data to multiple frontends: website, mobile app, B2B partners, third-party integrations.

Where Laravel remains monolith-oriented, Symfony + API Platform form the ideal couple to deliver a robust REST/GraphQL backend, automatically documented, and maintainable over ten years. Its automatic OpenAPI documentation generation spares you dozens of days of manual documentation and ensures the spec stays in sync with the code.

For you, it's the guarantee of an API your partners can integrate without friction and your internal teams can maintain without surprise.

Relevant when
  • REST or GraphQL backend consumed by multiple frontends (web + mobile + partners)
  • Need for OpenAPI kept up-to-date automatically: critical gain on multi-team projects
  • Decoupled architecture where the backend must remain stable while the front evolves
  • Validation, security, pagination and filtering to industrialize properly
  • Team already comfortable with Symfony: it's the logical next step
Skip it when
  • ×Monolithic application with integrated back-office: Laravel + Filament is faster
  • ×A single simple endpoint: oversized, Slim or a Symfony controller suffices
  • ×Team without Symfony culture: the cumulative learning curve is too steep
  • ×Frontend very tightly coupled to the backend (shared templates): no point in decoupling
My approachHow I tackle it concretely
  1. 01

    Resource modeling in Doctrine entities annotated with API Platform attributes

  2. 02

    Fine-grained serialization by groups (read, write, admin): explicit API surface control

  3. 03

    JWT or OAuth2 authentication depending on context (LexikJWT, Hydra)

  4. 04

    OpenAPI documentation consulted and corrected with every endpoint addition: the spec is truth

  5. 05

    Systematic functional tests on all critical endpoints (PHPUnit or Pest)

+ Related servicesOfferings associated with this tech
Frequently asked questionsAbout this technology specifically
  • API Platform vs Express/FastAPI?
    API Platform is the mature choice in PHP for teams already on Symfony. Express (Node) or FastAPI (Python) are functionally equivalent in their respective ecosystems. The choice depends on the team's existing stack and integration needs (often we follow the rest of the IT system's language). For a French SMB with PHP history, API Platform remains the most defensible option.
  • How much does an API Platform project cost?
    For a medium business API (10-20 endpoints, auth, validation, OpenAPI doc), expect €3,000 to €12,000. For a larger API (50+ endpoints, multi-role, complex hooks), €10,000 to €25,000. Automatic doc generation and Symfony tooling allow shipping faster than a manually assembled equivalent.
  • REST or GraphQL with API Platform?
    Both are natively supported by the same entity definition. That's one of the strengths. REST for most cases (simplicity, HTTP cache, tooling). GraphQL if your frontends consume highly variable structures (mobile + very different dashboard) and want to avoid over- or under-fetching. Decision project by project, not by dogma.
  • How does API Platform evolve long-term?
    Actively maintained, funded by Les-Tilleuls.coop (the French company behind the project), version 3 released in 2022 and version 4 in 2024 with a major refactor oriented around PHP attributes. The project is solid, the French community active, and production use at large companies (BlaBlaCar, M6, etc.) attests to its sustainability.
  • Can API Platform work without an admin interface?
    Yes, and that's even its main use case. The project includes an optional React admin (API Platform Admin) for internal needs, but the typical use is to serve a custom frontend (web and/or mobile) that consumes the endpoints. The backend stays pure API.
API · REST

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