PRODUCT · TOOLS

Hosted MCP. Auth handled. Calls verified.

We host the MCP servers, run end-user OAuth in your dashboard, and verify every tool call before it runs. Your AI just calls the tool.

Get started — free
TOOLS · session_84a35 calls · oauth'd as user_28f3a
github.create_issue()200
slack.send_message()200
linear.create_ticket()200
gmail.search()200
stripe.create_invoice()200
/tools

Tools

Hosted MCP. We host the servers, handle end-user auth, and verify every tool call.

  • GitHub
  • Slack
  • Linear
  • Notion
  • Gmail
  • Stripe
30+hosted MCP servers
~1,200OAuth flows / day
98%tools succeed first try
0refresh tokens you store
What it does

The three things tools actually does.

WE HOST

MCP servers, run by us.

Every MCP server in our catalog is hosted, monitored, and updated by us. No protocol code in your repo, no Docker images you babysit.

we host · ok
→ github + linear
200 · 98%
WE AUTH

End-user OAuth, your brand.

Drop a one-line iframe in your settings page. Your users connect GitHub, Slack, Gmail, Linear under your branding. Tokens never leave us.

we auth · ok
→ slack + discord
200 · 98%
WE VERIFY

Every tool call is checked.

Scope checks per user. Allowlists per app. Dry-run mode. Audit row per call. Your AI can't post 100 issues to the wrong repo by accident.

we verify · ok
→ gmail + calendar
200 · 98%

OAuth flows, refresh tokens, scope upgrades, integration tests for every tool — that's the swamp. We host it. Your AI just calls the tool.

Why we built this

Urgent backstory

We watched five AI startups in a row hand-roll the same tools stack — and burn three weeks doing it. We packaged ours so you don't have to. Drop the SDK in once; this product, plus the rest of the suite, comes with it.

Use it for

Four common
ways teams ship with Tools.

01G

GitHub + Linear

Create issues, comment, open PRs. Allowlisted repos per user.

02S

Slack + Discord

Post in channels, DMs, or threads. Workspace-scoped.

03G

Gmail + Calendar

Read, send, schedule. With user consent. With audit logs.

04S

Stripe + Notion

Refund, search, write a doc. The boring half of automation.

How it works

Four steps, ten minutes.

1

Mount the OAuth UI

<assistiv-tools user="u_28f3a" />
2

User connects apps

GitHub, Slack, Gmail — your branding
3

Tools auto-register

Available in tool-calling API
4

Model calls them

client.chat({ tools: "all" })
It works with

The stack you already have.

GitHub
Slack
Linear
Notion
Gmail
Stripe
Discord
HubSpot
“

We launched a Notion + Linear AI agent without writing a single OAuth callback. That used to take a sprint.

— Mira · founder, Stagecue
S
Pricing

Free to ship. Pay when you scale.

FREE$0

Up to 1k requests/mo. Every product included.

Start free →
SCALE$0.0008

per request, after free tier. No markup on tokens. Cancel anytime.

What's next

Shipping this quarter.

Read full changelog →
WK 12Box + Dropbox
WK 13HubSpot CRM tools
WK 14Custom tool SDK
WK 15Tool-call replays
ONE AFTERNOON AWAY

Ship hosted MCP tools this afternoon.

We onboard 1–2 indie startups a week. If you'd rather ship features than maintain a tools stack, talk to us.

Get started — free