The debate between REST and GraphQL for headless WordPress continues in 2026. REST is simpler and better supported by caching layers; GraphQL offers flexibility and reduces over-fetching. For most teams, REST wins on simplicity — especially when using WordPress as a content backend for AI agents.\n\nThe WordPress REST API has matured significantly. Combined with OAuth 2.0 and scoped tokens, it is a solid foundation for secure AI agent integrations. Tools like AI Connect leverage the REST API to provide structured, predictable responses that AI agents can reason about.
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