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Arc

Model Context Protocol

Use Arc from the AI tools where engineering work happens.

Arc’s MCP server lets compatible AI clients search the engineering graph, follow traceability, assess change impact and prepare controlled updates. Permissions and human review stay in Arc.

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01 MCP capabilities

What can you do through Arc MCP?

Use natural-language tools without flattening the programme into a chat transcript. Arc returns the records, relationships and controlled actions behind the answer.

01

Read the programme record

Search and retrieve requirements, systems, interfaces, risks, changes, tests and evidence using the access already granted to the Arc user.

02

Follow engineering context

Move upstream to intent and downstream to allocations, interfaces, verification work and evidence without rebuilding the trace from separate files.

03

Assess a proposed change

Ask which connected records may be affected, inspect the cited paths and turn the result into a reviewable set of engineering actions.

04

Create controlled work

Create or update records, connect relationships and prepare changes on a branch. Reviewers remain responsible for approval and merge.

02 Worked example

How does an MCP-assisted change assessment work?

This illustrative CubeSat power example uses explicit records and arithmetic. It demonstrates the control flow, not a customer result or flight design.

Download the example dataset
  1. 01

    Ask

    A user asks a compatible AI client what would be affected by changing PAY-PWR-014 from an 18 W design point to 24 W.

  2. 02

    Retrieve

    The client uses Arc MCP to retrieve the current requirement revision, its 20 W cap, linked electrical interface and verification plan.

  3. 03

    Calculate

    The connected example moves total peak demand from 54 W to 60 W against 59 W available, changing margin from +5 W to −1 W.

  4. 04

    Explain

    The response cites the affected records, states the 4 W cap exceedance and identifies the interface and verification work that need review.

  5. 05

    Propose

    If authorised, the client prepares a branch with proposed record updates and review actions. It does not silently rewrite the accepted requirement.

  6. 06

    Review

    An engineer inspects the diff, assumptions and evidence, then approves, revises or rejects the proposed change in Arc.

03 Control model

What remains under human control?

MCP does not bypass Arc’s permissions, review or baseline controls. Read access follows the user. Write actions require authorisation. Material changes can be prepared on a branch so reviewers can inspect the diff and connected evidence before merge.

04 MCP FAQs

Arc MCP questions, answered.

How compatible AI clients use Arc records and controlled actions.

What can an AI tool read through the Arc MCP server?

With the user’s Arc permissions, a compatible MCP client can search and retrieve programme records including requirements, systems, interfaces, risks, changes, verification activities, tests and evidence. Responses retain record identifiers and relationship context so the source can be inspected in Arc.

Can an MCP client change information in Arc?

Yes. Authorised clients can create records, update fields, connect related items and propose controlled engineering changes. Arc applies the same workspace permissions and change controls used in the product rather than giving the client unrestricted access.

Can an AI agent merge a change into the accepted baseline?

An agent can prepare work on a change branch and explain the affected context. Reviewers inspect the diff and decide whether to approve and merge it. Arc keeps the accepted baseline under human control.

Can Arc MCP follow requirements traceability?

Yes. Clients can navigate upstream intent and downstream allocations, interfaces, implementation records, tests and evidence. They can also ask Arc to identify connected records that may need review when a requirement changes.

Does Arc MCP replace the Arc interface?

No. MCP gives compatible AI tools a controlled way to use Arc data and actions. Arc remains the place to inspect the complete engineering graph, manage access, review proposed changes and control programme baselines.

05 Use Arc through MCP

Bring one engineering question and inspect every source behind the answer.

Try Arc directly, then connect it to a compatible MCP client for governed search, traceability and change work.

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