Posts about how we do engineering at Arcjet.
How Arcjet hosts AI security models using Python, Open Inference Protocol, Go, and Modal: the architecture behind prompt injection detection.
How we defend Arcjet’s MCP tool outputs from prompt injection by separating trusted guidance from untrusted evidence in structured responses.
How we built Arcjet’s production MCP server in Go: integrating with an existing API, reusing auth and middleware, designing agent tools, and supporting OAuth discovery.
How we replaced a single devcontainer with isolated OrbStack VMs to run multiple parallel development environments for AI agent workflows — architecture, CLI, and tradeoffs.
The Arcjet Python SDK allows you to implement rate limiting, bot detection, email validation, and signup spam prevention in FastAPI and Flask style applications.
The tech stack behind Arcjet: WebAssembly runtimes, a Go gRPC decision API, and region-aware SNS→SQS→ClickHouse pipeline.
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