Oakallow MCP Server

Name: Oakallow
Author: oakallow

Runtime permission, approval, and audit governance for AI agent tool execution.

Oakallow is a hosted remote MCP server. It sits between an agent and the actions it wants to take, so that a specific action can be checked, gated behind human approval when it is risky, authorized with a single-use signed token, and recorded in an immutable audit log, at the moment of execution.

Website: https://oakallow.com
MCP endpoint: https://api.oakallow.io/mcp (Streamable HTTP)
OAuth 2.1 compliance: https://oakallow.com/docs/oauth
MCP protocol details: https://oakallow.com/docs/mcp

What this connector is for

Oakallow injects a governance checkpoint into a workflow that may also use other connectors. An agent does its investigative work (for example, looking up an account through another connector), forms a recommendation, and calls Oakallow to request approval for the action. A human approver then decides in the Oakallow dashboard or mobile app, under enforced multi-factor authentication.

The connector is a requester and pass-through, not a decider:

It can list your tools, check permissions, request approvals, and mint run tokens once an action is approved.
It cannot approve or deny on a human's behalf. Decisions happen on a separate, MFA-bound surface (the dashboard), never over the connector.

Standard tools

Tool	Purpose	Reads only
`list_my_tools`	Enumerate the tools available to the signed-in user in the named org (`org` arg; see below)	yes
`check_permission`	Ask whether a given tool call would be allowed, require approval, or be blocked (takes an `org` arg; see below)	yes*
`list_pending_approvals`	List approval requests still awaiting a human decision	yes
`check_approval_status`	Poll a pending approval request by reference number	yes

* check_permission returns a read-only verdict only — it does NOT create an approval or a reference. (The approval and its REF-… are created when you call the gated tool itself through oakallow.) It does have one side effect by design: checking an unregistered tool makes Oakallow auto-create a gated draft entry for it (with conservative, fail-closed defaults) so the eventual call is governed and the owner can triage it from the dashboard. This is intentional: an unknown tool is never silently trusted.

Choosing an organization

An Oakallow account can have more than one organization, and each org sets its own tools, permission rules, approvers, and alert paths. So an action must be checked against the right org — that is what determines who gets asked to approve and under which rules.

check_permission and list_my_tools accept an optional org argument: the org's external id (e.g. org_oak_…). The rule:

One org on your account: omit org. The connector uses your only org.
More than one org: pass org naming the org the action targets. If you omit it, the call is refused with guidance rather than guessing the wrong org.

You don't ask the connector to list your orgs — there is no org-enumeration tool. Instead, download the org-specific skill from that org's dashboard. Each org's skill carries its own org id and tells the agent to pass it. Install one skill per org you operate in; the agent reads the matching skill and passes the right org on every call.

The connector authorizes the org you pass against your signed-in identity: you can only target an org you can actually act in (you are its team owner/admin, or you are in that org's approver group). Passing an org you don't have access to is refused — the skill is a convenience, not a grant of access.

Resources

oakallow exposes two read-only MCP resources. They are preflight signals an agent (or a client UI) can read before committing to route an action through oakallow. Both require the mcp:read scope, neither is a tool call, and neither is billed.

Resource	Returns	Reads only
`oakallow://status`	Liveness of the connector for the signed-in session: status, endpoint, server version, protocol version, and the granted scopes. A successful read is itself the proof the session is valid. No account identity or PII is returned.	yes
`oakallow://credits`	Whether a governed call would currently be funded for the org this session resolves to, so an agent can fail fast before requesting an approval that could not be paid for.	yes

oakallow://credits is scoped to the caller's own billing org and resolves it the same way a real tool call does, so a can_fund: true result genuinely means the eventual approval will be funded (including team-pool fallback). It returns only a can_fund boolean and the org's name and external id. It deliberately discloses no balance figures: dollar amounts are surfaced only to the team owner in the dashboard, never over the connector. If the session resolves to no org, or to more than one, it returns can_fund: false with a reason rather than guessing which org would be billed.

Connecting

The remote endpoint requires OAuth 2.1 (PKCE) — there is no anonymous access. An oakallow account is the prerequisite for connecting.

Add https://api.oakallow.io/mcp as a custom connector in your MCP client (Claude, Claude Desktop, Cowork, ChatGPT, or any Streamable HTTP MCP host). You will be redirected to sign in to Oakallow and approve the requested scopes:

mcp:read: list tools, view pending approvals, check permissions, read activity.
mcp:write: create approval requests and mint run tokens.

You don't configure any of this by hand: an unauthenticated request returns 401 with a WWW-Authenticate header pointing to the endpoint's RFC 9728 protected-resource metadata (/.well-known/oauth-protected-resource), so a spec-compliant MCP client discovers the authorization server and runs the OAuth flow automatically.

See examples/ for a Claude Desktop config and an OAuth flow walkthrough.

Skill

SKILL.md is an agent skill that documents when and how to use the oakallow tools: the request, approve, poll, and act workflow, how to phrase approval reasons, and what to do on allowed, requires_approval, or blocked verdicts. Point your agent at it to govern tool actions correctly.

Trigger prompts

PROMPT.md has short, copy-paste one-liners to drop into your agent's system prompt so it actually consults the skill. The skill is the procedure; a trigger prompt is what makes the agent look. Three options, from "gate every tool call" to "gate a customer-named set," plus an inline example pattern for a real request.

How a governed call works

The agent calls Oakallow with its credential.
Oakallow resolves the permission rule for the specific tool, tenant, and resource.
If the action is allowed, Oakallow mints a single-use, HMAC-signed run token.
If approval is required, an approval request is created and a human is notified. The agent's call is held until the request is decided or expires.
The agent uses the run token to perform the action; Oakallow writes an immutable audit row capturing the outcome.

Oakallow lives outside the execution path. It governs and records what was reported; it does not run your tools or receive your tool parameters beyond a PII-scrubbed reason.

License

See LICENSE.

Changelog

See CHANGELOG.md.