Workflow MCP Server

API pattern storage and replay, DPAPI-encrypted credential vault, data transform pipelines, watch polling, and workflow chains — all through one MCP server. Single Rust binary, 37 tools, zero runtime dependencies.

Part of CPC (Copy Paste Compute) — a multi-agent AI orchestration platform. Related repos: manager · local · hands · cpc-paths · cpc-breadcrumbs

Workflow is the graduation pipeline partner for hands. Use hands to automate a browser task once, capture the underlying API calls with hands:browser_learn_api, store them with workflow:api_store, then replay via direct HTTP forever. No browser needed on future runs. 100x faster.

What's New — v1.3.5

• v1.3.5 — Clippy + dead_code cleanup: removed 2 crate-level allows, added targeted item-level allows with justification.
• v1.3.4 — Fixed 69 UTF-8 mojibake sequences in skill reference files (em-dashes + arrows). Documentation-only patch.
• v1.3.3 — Cargo.toml metadata cleanup (license, repository, description fields).
• v1.3.1 — Two-Entry sentinel keyring probe on startup. Detects mock backends that don't persist across instances.
• v1.3.0 — Cross-platform OS keyring storage (Windows Credential Manager, macOS Keychain, Linux Secret Service). migrate_dpapi_to_keyring tool for one-time migration from legacy DPAPI. Linux headless guard.

Older releases

• v1.2.5 — TOTP DPAPI fix + monorepo sync. Null-byte stripping after DPAPI decrypt.
• v1.2.1 — Meta-tool dispatch fixes, credential round-trip hardening, TOTP module (6 tools).
• v1.1.1 — Initial public release. 31 tools across 7 modules.

See CHANGELOG.md for full details.

The Graduation Pipeline

Day 1: Browser automation (hands MCP server)
        ↓ hands:browser_learn_api extracts endpoint patterns from network traffic
Day 2: Store patterns (workflow:api_store)
        ↓ Named pattern with URL template, headers, credential reference
Day N: Direct HTTP replay (workflow:api_call)
        ↓ No browser. No Chrome. No selectors. Just HTTP.

The economics:

• Browser session: ~3-5 seconds startup + page load + interaction + fragile selectors
• API call: ~50-200ms, no browser process, no DOM, no breakage from UI redesigns

Production proof: 24+ stored API patterns in daily use against healthcare payer FHIR endpoints. Once a pattern is stored, future calls run direct-to-HTTP — no browser window opens.

Capabilities

PRODUCTION (stable, battle-tested)

Category	Tools	Description
API Patterns	api_store, api_call, api_list, api_test, api_delete	Store discovered API patterns with URL templates and credential references, replay via direct HTTP
Credentials	credential_store, credential_get, credential_list, credential_delete, credential_refresh	Windows DPAPI-encrypted credential vault. Store by name, reference from API patterns. OAuth refresh support.
Transforms	transform_pipe, pipe_test	JSON transform pipelines: pick, rename, flatten, filter, template, group_by, math. Chain operations sequentially.
Watches	watch_define, watch_list, watch_check, watch_schedule, watch_delete	Define polling conditions, trigger actions when conditions are met
Workflows	workflow_define, workflow_run, workflow_list, workflow_status, workflow_delete	Trigger-action chains composing watches, API calls, and transforms

EXPERIMENTAL (functionally complete, not production-validated)

Category	Tools	Description
Flows	flow_record_start, flow_record_step, flow_record_stop, flow_replay, flow_adapt, flow_dispatch, flow_list, flow_delete	Record and replay multi-step MCP tool sequences. 1 test flow stored, never run in production. Use for prototyping. A follow-up release will harden based on real-world usage.

37 tools total across 7 modules.

Install

Windows x64

1. Download workflow-v1.3.5-x64.exe from the latest release.
2. Rename to workflow.exe and place in %LOCALAPPDATA%\CPC\servers\.
3. Add to your claude_desktop_config.json:

   {
     "mcpServers": {
       "workflow": {
         "command": "%LOCALAPPDATA%\\CPC\\servers\\workflow.exe"
       }
     }
   }

4. Restart Claude Desktop.

---

Windows ARM64

1. Download workflow-v1.3.5-aarch64.exe from the latest release.
2. Rename to workflow.exe and place in %LOCALAPPDATA%\CPC\servers\.
3. Add to your claude_desktop_config.json:

   {
     "mcpServers": {
       "workflow": {
         "command": "%LOCALAPPDATA%\\CPC\\servers\\workflow.exe"
       }
     }
   }

4. Restart Claude Desktop.

---

Prerequisites

• Windows 10/11 — credential encryption requires Windows. On other platforms, credentials are stored unencrypted (development/testing only).
• No Node.js, no Python, no runtime dependencies.
• Keyring integration — credentials are stored in the OS keyring (Windows Credential Manager, macOS Keychain, Linux Secret Service).

For full per-machine setup (paths, credential vault setup, DPAPI notes), see docs/per_machine_setup.md.

Build from Source

git clone https://github.com/AIWander/workflow.git
cd workflow
cargo build --release

Binary appears at target/release/workflow.exe. Requires Rust stable toolchain — nightly is not required.

Quickstart — The Graduation Flow

This is the core use case. You've been using hands to automate a browser task. Now graduate it to a direct API call.

Step 1: Discover the API (hands)

hands:browser_launch()
hands:browser_navigate(url: "https://portal.example-health.com")
# ... interact with the page ...
hands:browser_learn_api()  → extracts endpoint patterns

Step 2: Store credentials and pattern (workflow)

workflow:credential_store(
  name: "payer_token",
  value: "<captured_bearer_token>",
  credential_type: "bearer",
  service: "example_health"
)

workflow:api_store(
  name: "payer_member_search",
  url_pattern: "https://api.example-health.com/fhir/Patient?name={name}",
  method: "GET",
  credential_ref: "payer_token",
  notes: "Discovered via browser_learn_api 2026-03-15"
)

Step 3: Test it

workflow:api_test(name: "payer_member_search", params: {"name": "Smith"})

Step 4: Use it forever — no browser

workflow:api_call(name: "payer_member_search", params: {"name": "Jones"})

When the API breaks (token expired, endpoint changed), the response includes a fallback_hint telling you to go back to the browser. Re-discover, re-graduate.

Key Concepts

Credential by Reference

Never hardcode tokens in API patterns. Store credentials by name in the DPAPI-encrypted vault, reference them via credential_ref in api_store. When tokens rotate, update one credential — all patterns that reference it automatically get the new value.

Execution Model

flow_replay, watch_check, and workflow_run return execution plans, not results. They tell your session what tools to call with what parameters. Your session executes the plan. This is by design — workflow doesn't have access to other MCP servers.

Data Storage

All data lives in C:\CPC\workflows\ as JSON files with atomic writes (write to .tmp, then rename). Safe against crashes mid-write.

Recommended CLAUDE.md Instructions

See skills/workflow-recommended-instructions.md for a copy-paste block to add to your CLAUDE.md. Covers the credential-by-reference mandate, graduation discipline, and experimental flow warnings.

Examples

See the examples/ directory:

• graduation_pipeline.md — Full hands-to-workflow graduation walkthrough
• credential_storage.md — DPAPI vault patterns and token rotation
• api_pattern_replay.md — Advanced API patterns with transforms

Pairs With: hands MCP Server

Workflow and hands are designed as two halves of the same pipeline.

Scenario	Use
First time doing a task	hands (browser)
Task has a known API pattern	workflow (api_call)
API call fails / token expired	hands (browser re-auth) then workflow (credential_store)
Need to transform API response	workflow (transform_pipe)
Need to poll for changes	workflow (watch_define)

---

Compatible With

workflow runs standalone for API pattern replay, credential storage, watches, and transform pipelines. It pairs naturally with the rest of the CPC stack when you want end-to-end automation.

• Pair with hands for browser-side discovery (browser_learn_api captures the network traffic that workflow then stores and replays).
• Pair with local when pipelines need local shell, file, or transform steps between API calls.
• Pair with manager to wrap workflow's replay tools in delegated tasks with breadcrumb tracking.

Host clients: Claude Desktop (claude_desktop_config.json), Claude Code (~/.claude/mcp.json), OpenAI Codex CLI, Gemini CLI, or any MCP-compatible host. The skill file at skills/workflow.md works standalone too — load it as an Anthropic skill for no-server behavioral guidance (planning, review, discipline reminders).

First-run tip for Claude clients

Turn on tools always loaded in Claude's tool settings. Workflow exposes 37 tools across 7 modules — API patterns, credentials, transforms, watches, workflows, flows — and first-run discovery can miss subsets if lazy-loading is on. Always-loaded makes the full surface visible immediately.

Failure modes

Most workflow failures happen when a stored pattern drifts from the live service. The tools try to detect this and point you back to the right recovery path:

• Stored API pattern expired (401/403) — api_call response includes a fallback_hint pointing back to hands for re-discovery. Re-auth in the browser, credential_store the new token, and the same pattern works again.
• Endpoint moved or schema changed — api_call returns a non-auth error (404, 400, unexpected shape). The pattern itself is stale; re-run browser_learn_api on the updated flow and overwrite with api_store.
• Keyring unavailable (Linux headless) — credential_store refuses to store unencrypted secrets on Linux without Secret Service. Install a keyring backend or mark the environment dev-only.
• Transform pipeline silently drops fields — usually a pick stage with a wrong key. Use pipe_test to run the pipeline against a sample payload and inspect each stage's output.
• Workflow chain stuck — workflow_run returns an execution plan, not results. If a step never executes, confirm the host session is actually dispatching the plan's tool calls.

License

Apache 2.0 — see LICENSE.

Contributing

Issues welcome; PRs considered but this is primarily maintained as part of the CPC stack.

Contact

Joseph Wander — josephwander@gmail.com GitHub: github.com/AIWander