---
title: "List Available Blocks"
method: GET
path: "/workflows/blocks"
tags: ["Workflow"]
---

# List Available Blocks

`GET /workflows/blocks`

List all workflow block types with their input specs schemas.

## Headers

- `x-api-key` string, nullable

## Response `200`

Successful Response

- BlockInfoResponse[]
  - `block_name` string, required — Registered block type name (e.g. 'enrich_lead', 'find_email').
  - `specs_schema` object, required — JSON Schema describing the block's `specs` payload.

## Other responses

- `400` — Request was rejected by the route's validation rules.
- `401` — Missing or invalid API key.
- `403` — Caller does not have access to this workflow.
- `404` — Workflow, run, or job not found.
- `409` — Workflow with the supplied ID already exists.
- `422` — Request body failed validation.
- `500` — Unexpected server error. Retry with backoff.

---

[API](https://skmtc.dev/sixtyfour/apis/sixtyfour-api.md) · [All operations](https://skmtc.dev/sixtyfour/apis/sixtyfour-api/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/sixtyfour/sixtyfour-api/revisions/51f0a2b62b44/schema)