Components reference¶

URI schemes for every transport, sink, and processor that's a first-class Helix endpoint. Each scheme has its own page documenting:

URI shape (path tokens + query params)
Every parameter, its type, default, and whether it's Producer/Consumer/Both
Message body and header contracts
Examples (validated against helix validate)
Deep links: corresponding JSON Schema in helix/schemas/components/

All schemes¶

The audit (bin/audit-docs --category components) is the source of truth. The list below is regenerated by the docs build.

While the per-scheme pages are being written, the old single-file overview at _legacy-overview.md still applies. Both pass bin/audit-docs is the merge gate.

Category	Schemes
Core messaging	`direct`, `seda`, `mock`, `timer`, `cron`, `log`
HTTP / RPC	`http`, `https`, `http-server`, `grpc`, `ws`, `ws-server`
Files / storage	`file`, `ftp`, `ftps`, `sftp`, `s3`
Brokers	`kafka`, `nats`, `amqp`, `rabbitmq`, `mqtt`, `sqs`, `redis`
Databases	`postgres`, `mongodb`, `elasticsearch`, `sql`, `memx`, `memvec`
Vector stores	`milvus`, `pinecone`, `qdrant`
Email / chat	`smtp`, `slack`
LLM providers	`openai`, `anthropic`, `ollama`, `vertex`, `gemini`, `azure`, `bedrock`, `cohere`, `mistral`, `huggingface`, `replicate`, `fireworks`, `groq`, `together`, `xai`, `vllm`, `deepinfra`, `openai-server`
Agentic / interop	`agent`, `tool`, `mcp`, `mcp-server`, `a2a`, `a2a-server`, `a2ui`, `agui`
Domain	`edi`, `pdf`, `image`, `browser`, `chart`, `template`, `docker`, `governance`, `csv`, `xlsx`
Geospatial	`geo`, `geocoder`

Total: 71 schemes registered across 64 packages (some packages register more than one scheme).

Source¶

Package directory: pkg/component/<name>/
Discovery: bin/audit-docs --category components
Schemas: helix/schemas/components/<scheme>.json (where present)