Claude Build Day submission. A remote MCP server that lets a Claude agent build, deploy, run, and debug real RPA workflows on Automat — browser/API automations that then run on their own schedule, deterministically, with zero LLM tokens per run.

The agent writes the automation once (using tokens); the workflow then runs forever on a cron with no tokens per run. Token-cheap to create, token-free to operate.

The brief

• Problem. Back-office/RPA automations take days to build and stay locked inside builder UIs. An AI agent can do a task once, but re-doing it every run burns tokens and isn't repeatable or schedulable.
• Who it's for. Anyone with a recurring browser/API task — ops, back-office, founders — and the agents acting on their behalf.
• Done looks like. From a chat/agent: "build a workflow that does X on a schedule." The agent authors it through this MCP server, deploys it live, runs it, and returns a recording — and it keeps running on its schedule with no tokens.

What we built at Build Day

This repo is the agent-facing layer: one Vercel Function (api/mcp.ts) exposing 32 MCP tools that forward to Automat studio's project-scoped agent API. Built during the event:

• Full tool surface — discover (get_docs, get_workflow_schema, list_*), build (create_workflow, edit_workflow composite-patch model, read_workflow), manage (versions, lifecycle, schedules), run & debug (run_workflow, get_run with timeline/io/recording, cancel_run), plus secrets, resources, extractors, and HITL.
• get_docs — serves the runtime authoring model (code-node globals, $('NodeName'), fetch, worked examples) so an agent writes working code nodes with no source access.
• Pass-through auth — the caller's project key is forwarded per request; no secrets stored in this public repo.
• (The backend it forwards to — studio's /api/agent/* — was built in parallel in our private studio repo.)

Demo — "Sauce Demo Shopper"

A Claude agent built this through the MCP server: a deterministic Playwright code node that logs into saucedemo.com, adds an item, and checks out — recorded, ~9s/run, 0 tokens per run, deployed active and schedulable.

• Authored via create_workflow + edit_workflow, executed via run_workflow, recording fetched via get_run(include:["recording"]).
• When the live run hit a native Chrome "breached-password" dialog that swallowed clicks, the agent reproduced it with Chrome DevTools and rewrote the clicks as page.evaluate(() => el.click()) — self-corrected, then re-ran green.

Try it / verify

Live, and "done" is verifiable by the model with no human in the loop:

• Responding URL — https://workflows.runautomat.com/api/mcp answers tools/list and tools/call over Streamable HTTP.
• Connect any MCP client with a project key (see Connect a client) and run the loop: get_docs → create_workflow → run_workflow → get_run.
• Acceptance checklist (rubric). (1) endpoint lists 35 tools; (2) create_workflow + edit_workflow(patch) each save a new version; (3) run_workflow → get_run returns status:"completed" with structured output; (4) a browser workflow returns a recordingUrl.

How Claude built it (Opus 4.8)

Opus 4.8 drove the whole build: it explored the studio + runtime repos to design the tool schemas, grounded the descriptions in MCP best practices, and self-verified — running a full stress test across every tool and real workflow runs through its own tools, then fixing a live browser failure with Chrome DevTools. It's repeatable: push to main auto-deploys, and get_docs + the tool surface let any agent rerun the build loop on a brand-new task.

Endpoint

https://workflows.runautomat.com/api/mcp

Streamable HTTP, stateless. The Vercel default URL (https://robotic-workflows-mcp-server.vercel.app/api/mcp) also resolves.

Authentication

Pass-through. The caller supplies a Studio personal access token (pat_…, minted in Studio → Settings → Personal access tokens); the server forwards it as a Bearer to the studio public v1 API per request. No tokens are stored or committed. The token is read three ways (checked in order):

Source	Use
?api_key=pat_… query param	Claude web/desktop connector (its UI has no header field)
x-api-key: pat_… header	generic clients
Authorization: Bearer pat_… header	Claude Code CLI

Configuration (Vercel env)

Var	Purpose
STUDIO_API_BASE_URL	Origin of the studio API. Production: https://studio.runautomat.com (stable). For a studio preview deploy, use that preview's URL (it changes per deploy). No trailing slash needed.
VERCEL_AUTOMATION_BYPASS_SECRET	Leave UNSET for production (the studio.runautomat.com custom domain is public). Set it only when STUDIO_API_BASE_URL points at a protection-enabled preview deploy.

Auth note: a PAT is scoped to the studio environment it was minted in. Use a token minted at https://studio.runautomat.com/settings for production — a preview/staging token will 401 against prod (different database).

Connect a client

Replace pat_… with your personal access token. A PAT spans every project you can access, so a target project must be selected — the primary way is the set_project tool (the agent calls it once with the project UUID; the server injects it into every subsequent API call, best-effort warm-instance memory that self-heals via a "Missing project id" error → re-call set_project). Alternatively pin it on the connection: &project_id=<uuid> on the URL, an x-project-id header, or STUDIO_DEFAULT_PROJECT_ID on the server (set_project overrides all three). Secrets tools additionally need the Doppler identifiers (dopplerProject/dopplerConfig tool inputs, or STUDIO_DOPPLER_PROJECT/STUDIO_DOPPLER_CONFIG).

Token tiers: read tokens list/inspect (no definition JSON — read_workflow full/node need an authorship-tier PAT; graph degrades gracefully); write tokens also run workflows / stop sessions / complete HITL tasks; workflow, schedule, secret, and resource mutations need authorship (author role + write token). Tier ledger: studio docs/PROGRAMMATIC_ACCESS.md.

Claude web / desktop — Settings → Connectors → Add custom connector → URL:

https://workflows.runautomat.com/api/mcp?api_key=pat_…&project_id=<uuid>

Claude Code

claude mcp add --transport http automat \
  "https://workflows.runautomat.com/api/mcp?api_key=pat_…&project_id=<uuid>"

MCP Inspector

npx @modelcontextprotocol/inspector
# Streamable HTTP → https://workflows.runautomat.com/api/mcp?api_key=pat_…&project_id=<uuid>

Development

npm install
npm run dev          # vercel dev → http://localhost:3000/api/mcp
npm run inspector    # MCP Inspector
vercel --prod        # deploy (requires vercel login)

Stack

mcp-handler (wrapping @modelcontextprotocol/sdk) as a single Vercel Function — no framework. The whole server is api/mcp.ts. It serves /api/mcp; a /mcp rewrite is not used because it collides with Vercel's built-in /api routing guard.

---

Tools

Live reference for the 35 tools. Each forwards to the studio public v1 API (STUDIO_API_BASE_URL + /api/v1/projects/{projectId}/*), passing the caller's PAT; the project comes from the connection (project_id). The build/edit flow mirrors studio's own builder agent: read_workflow → edit_workflow(patch) with server-side validation.

Conventions

• Transport. Streamable HTTP (stateless), at https://workflows.runautomat.com/api/mcp.
• Scope. One key = one project. No tool takes a projectId.
• Workflow definition. The @automat/runtime WorkflowSchema: { name, description?, instructions?, notes?, settings, nodes[], edges[], sessionFields?, inputSchema?, outputSchema?, helpers?, files?, runtimeVersion? }. Nodes are a discriminated union on type (start, end, block, decision, document, hitl). Edges are { from, to, handle? }. Call get_workflow_schema for the exact shape.
• Errors. On failure a tool returns result text { "error": { "code", "message", "issues"? } }. Codes: not_found, validation_failed, version_conflict, conflict, lifecycle_gated, forbidden, bad_request, rate_limited, unauthorized, internal_error. issues[] accompanies validation_failed.
• Pagination. List tools take limit (default 25, max 100) and cursor, and return { items, nextCursor } (the cursor wraps the API's page number).

Each tool lists its input, output, and the backing API call (shown in legacy /api/agent/* form; the client rewrites it onto /api/v1/projects/{projectId}/* at request time).

Context & schema

list_projects

Discovery — the projects this token can access (allowlist-scoped tokens see only their allowlist). Use it to pick a set_project target.

• Input: { limit?, cursor? }
• Output: { items: [{ projectId, name }], nextCursor }
• → GET /api/v1/projects (the one project-agnostic list)

set_project

Selects the target Studio project for every subsequent call — call first when the connection has no ?project_id=. Validates the id against the list_projects discovery listing (a project-scoped probe can't tell a typo from an empty project on an all-projects token). Best-effort warm-instance memory: a "Missing project id" error later just means "call set_project again".

• Input: { projectId } (UUID — discover via list_projects)
• Output: { projectId, validated: true }
• → validates via GET /api/v1/projects

get_docs

Authoring guide — call first. How to write code/decision nodes: globals ($('NodeName'), fetch, secrets, page/context, logger), async/return semantics, node types, browser/recording, schedules, and worked examples.

• Input: { topic?: 'overview'|'codeNodes'|'nodeTypes'|'browser'|'secrets'|'schedules'|'examples' }
• Output: the docs (all sections, or one topic)

list_runtime_versions

• Input: none
• Output: { versions: [{ version, isLatest }], note }
• Runtime-version selection isn't exposed by the API; returns latest.

get_workflow_schema

• Input: { runtimeVersion?: string } (default latest)
• Output: { runtimeVersion, jsonSchema }
• → GET /api/agent/schema

Workflows

list_workflows

• Input: { status?, search?, limit?, cursor? } (status: development | preview | active | disabled)
• Output: { items: [{ workflowId, name, description, status, activeVersionId, apiEnabled, apiUrlSlug, sessionCount, lastRunAt, updatedAt }], nextCursor }
• → GET /api/agent/workflows (status/search filtered client-side)

create_workflow

• Input: { name, description?, definition?, runtimeVersion? } — omit definition for a minimal start → end scaffold
• Output: { workflowId, versionId, versionNumber, status }
• → POST /api/agent/workflows

copy_workflow

• Input: { workflowId, name? }
• Output: { workflowId, name }
• Client-side: reads the source's active definition, then create_workflow with it. Schedules/runs not copied.

read_workflow

• Input: { workflowId, view: 'graph' | 'node' | 'full', nodeName? } (nodeName required for node)
• Output: { _meta: { workflowId, versionId, versionNumber, status, apiEnabled, apiUrlSlug }, ... } — graph (nodes/edges + metadata — no code bodies, but per-node codeChars, decision branches/elseLabel, and a helpers index [{name, description, codeChars}]), node (one node incl. code), full (entire definition incl. helper code). Pass _meta.versionId to edit_workflow/edit_node_code.
• Tiers: full/node return definition JSON → authorship-tier PAT required (403 forbidden otherwise); graph works with any token, degrading to the server's lean names/types+edges view without authorship.
• → GET /api/agent/workflows/{id}?view=…; the rich graph projection derives from view=full, falling back to the server's view=graph on a tier 403.

update_workflow

• Input: { workflowId, name?, description?, status?, apiEnabled?, apiUrlSlug? }
• Output: the updated workflow
• status: active needs a published version; disabled auto-pauses schedules. → PATCH /api/agent/workflows/{id}

delete_workflow

• Input: { workflowId } · Output: { success: true } · soft delete → DELETE /api/agent/workflows/{id}

Editing

edit_workflow

• Input: { workflowId, patch, expectedActiveVersionId? }

  patch = {
    nodes?: { add?: Node[], update?: [{ name, patch }], remove?: string[] },
    edges?: { add?: Edge[], remove?: Edge[] },
    // any top-level WorkflowSchema field: settings deep-merges, others replace
  }
  

• Output: { ok: true, versionId, versionNumber, deduped } or { error: { code, message, issues? } }
• Client reads the active definition, applies the patch (order: nodes.remove → nodes.add → nodes.update [rename rewrites edges] → edges.remove → edges.add → top-level), then PUTs the full definition. The server validates → a new version (one edit, one version). expectedActiveVersionId (from read_workflow's _meta) gives optimistic concurrency. → GET + PUT /api/agent/workflows/{id}
• Best for structural edits; nodes.update replaces each patched field wholesale — for partial code changes use edit_node_code.

edit_node_code

• Input: { workflowId, nodeName, oldString, newString, field?: 'code' | 'instructions' | 'expression', replaceAll?, expectedActiveVersionId? }
• Output: { ok: true, versionId, versionNumber, deduped, replacements, fieldChars } or { error: { code, message } }
• Surgical find/replace inside one node — the agent sends only the changed snippet instead of resending a multi-KB code string. oldString must match exactly and occur once (or pass replaceAll); an ambiguous match returns the occurrence count, a miss returns the field sizes. field: 'expression' spans the legacy expression plus every decision branches[i].expression. Same read-modify-PUT + optimistic-concurrency path as edit_workflow. → GET + PUT /api/agent/workflows/{id}

Versions

list_versions

• Input: { workflowId, limit?, cursor?, named?, source? }
• Output: { items: [{ versionId, versionNumber, name, source, createdAt }], nextCursor, activeVersionId } → GET /api/agent/workflows/{id}/versions

get_version

• Input: { workflowId, versionId } · Output: { versionId, versionNumber, name, source, createdAt, definition } → GET …/versions/{versionId}

revert_to_version

• Input: { workflowId, versionId, expectedActiveVersionId? } · Output: { versionId, versionNumber, revertedFromVersionNumber } · non-destructive (appends a new version) → POST …/versions/{versionId}/revert

Schedules

All schedules run in UTC. A workflow may have many; run input comes from a linked project resource (inputResourceName), gated against the workflow's inputSchema.

list_schedules

• Input: { workflowId } · Output: { items: [{ scheduleId, name, recurrenceRule, startAt, status, nextFireAt, inputResourceName }] }

create_schedule

• Input: { workflowId, recurrenceRule (RFC 5545 RRULE, UTC), name?, startAt? (UTC), enabled?, inputResourceName? } — enabled: false creates it paused
• Output: { scheduleId } → POST /api/agent/workflows/{id}/schedules

update_schedule

• Input: { workflowId, scheduleId, recurrenceRule?, name?, startAt?, enabled?, inputResourceName? } — enabled maps to status active/paused
• Output: { scheduleId } → PATCH …/schedules/{scheduleId}

delete_schedule

• Input: { workflowId, scheduleId } · Output: { success: true } → DELETE …/schedules/{scheduleId}

Runs

run_workflow

• Input: { workflowId, input?, previewBranch? }
• Output: { sessionId, status: 'queued' } · input validated against inputSchema; lifecycle_gated if disabled / no active version. → POST /api/agent/workflows/{id}/run
• Defaults to the stable production Trigger runtime — studio resolves its deployment's default deploy tier (production on a prod studio). This is the path for all normal runs.
• previewBranch is an explicit opt-in — set it ONLY to run against a specific deployed preview-branch runtime (sends environment=preview + that branch). The branch must have a running preview worker or the run stalls in queued; that's why it's off by default and never inferred.

list_runs

• Input: { workflowId?, status?, limit?, cursor? } · Output: { items: [{ sessionId, workflowId, status, source, startedAt, endedAt, durationMs }], nextCursor } → GET /api/agent/sessions

get_run

• Input: { sessionId, include?: ('timeline' | 'io' | 'logs' | 'recording')[], logsCursor? }
• Output: { sessionId, workflowId, versionId, status, source, input, output, startedAt, endedAt, durationMs } plus, when requested: timeline [{ name, type, status, startedAt, endedAt, durationMs }], nodeIO [{ name, input, output }], recordingUrl, logs { entries, nextCursor }.
• timeline/io ← GET /sessions/{id}/nodes; recording ← the session; logs ← /sessions/{id}/logs (best-effort — returns null + logsNote until that endpoint is deployed).

cancel_run

• Input: { sessionId } · Output: { success: true, status: 'canceled' } → POST /sessions/{id}/stop

Human-in-the-loop

list_hitl_tasks

• Input: { sessionId?, status?, limit?, cursor? } (status: pending | completed | expired)
• Output: { items: [{ taskId, sessionId, workflowId, nodeName, prompt, actions, isApproval, fields, status, createdAt, expiresAt }], nextCursor } → GET /api/agent/hitl/tasks

complete_hitl_task

• Input: { taskId, action, fields? } · Output: { success: true } → POST /api/agent/hitl/tasks/{taskId}/complete

Secrets

Project-scoped. Values are never returned.

list_secrets

• Input: { lifecycle?, limit?, cursor? } · Output: { items: [{ key, last4, lifecycle, updatedAt }], nextCursor }

set_secrets

• Input: { secrets: [{ key, value, description?, lifecycle? }] } · Output: { updated: [keys] } · upsert by key (resolves key→id, then PUT or POST)

delete_secret

• Input: { key } · Output: { success: true } · resolves key→id

Resources

Data resources, referenced by name from block/document nodes and schedule inputs. Each has a lifecycle (development | preview | active).

list_resources

• Input: { kind?, lifecycle?, search?, limit?, cursor? } · Output: { items: [{ name, kind, description, lifecycle, updatedAt }], nextCursor }

get_resource

• Input: { name, lifecycle? } · Output: { name, kind: 'data', value, description, lifecycle, updatedAt }

set_resource

• Input: { name, value, description?, lifecycle? } · Output: { name } · upsert by name; omitting lifecycle seeds all stages. File-resource uploads not supported.

delete_resource

• Input: { name, lifecycle? } · Output: { success: true }

Extractors

Read-only. document nodes reference an extractorId; authoring is not exposed.

list_extractors

• Input: { search?, limit?, cursor? } · Output: { items: [{ extractorId, name, activeVersionId, description }], nextCursor }

get_extractor

• Input: { extractorId, view?: 'summary' | 'full' } · Output: { extractor }

Known gaps

• Session logs: studio /api/agent/sessions/{id}/logs is pending; get_run logs return null + a note until it's deployed.
• Schedules are UTC-only.
• File-resource uploads and extractor authoring are not yet available.

Roadmap

• Per-project API keys (today the caller's project-scoped studio key is forwarded as-is).
• Session logs + recording surfaced once the studio endpoint lands.
• Extractor authoring and file-resource uploads.