How do I connect apier.no to Claude?
By Antony Richard Grov, founder of Apier
Add apier.no to Claude as a custom connector with the MCP server URL https://www.apier.no/api/mcp, sign in on apier.no and click Allow, then add credit to the key Apier creates for the connection. The setup takes about five minutes. After that, Claude can look up Norwegian companies through apier.no when you ask it to.
What do I need before I start?
- A Claude account at claude.ai. A free account allows one custom connector.
- An Apier account. Create it with the email address you will sign in with when you connect.
- Prepaid credit. Lookups are charged per call, and the minimum top-up is NOK 50.
On a Team or Enterprise plan, an organization owner may need to add the connector before members can use it. How connectors work on those plans is described in Claude's help pages.
The button names in this guide are the ones in the claude.ai interface on 2026-11-05. Claude's screens can change, so a name or a menu may differ when you read this. The order of the steps stays the same: add the connector, sign in, add credit, test.
This is the setup used in the Telenor ASA case study. In that run, Claude used the connector to confirm that the company is active, to quote the registered signing rule and to fetch a signed evidence pack. The run page also lists what Claude could not do.
Step 1: add the connector
- In claude.ai, open Customize, then Connectors.
- Click Add, then Add custom connector.
- In Name, type
Apier. - In MCP server URL, type
https://www.apier.no/api/mcp. - Click Continue.
- Under Authentication, choose Sign in now.
- Under OAuth client, choose Register automatically.
- Click Add.
With Register automatically, Claude registers itself with apier.no, so you do not create a client id or paste a secret. You do not type an API key into Claude at any point in this guide.
Step 2: sign in and allow
- On the Apier connector page in Claude, click Connect.
- apier.no opens its consent page. Confirm that the page shows your account.
- Click Allow.
When you click Allow, Apier creates an API key for this connection and names it MCP OAuth connection. The key appears on your Apier dashboard next to your other keys. Every lookup Claude makes through the connector is charged to this key, which is why the next step adds credit to it.
Step 3: add credit to that key
- Open https://www.apier.no/dashboard/billing.
- Click Top up credits.
- Under Which API key should the credits fund?, choose MCP OAuth connection.
- Enter an amount from NOK 50 to NOK 10,000.
- Click Top up.
A new key starts at zero. That is why this step exists: without credit on the connection's key, the first lookup is refused. The credit goes to the key you choose in the list, so choose MCP OAuth connection and not one of your other keys.
For scale, the Telenor ASA run made 3 calls and cost NOK 1.50 in total. The minimum top-up of NOK 50 covers many runs of that size. The current price of each lookup is on the pricing page.
Step 4: test the connection
- Start a new chat in Claude.
- Type this prompt:
Use apier.no to check the Norwegian company with org number 982463718.
- Claude asks for permission before it uses each Apier tool. Click Allow once or Always allow.
Claude then answers from what apier.no returns for that company. The org number belongs to Telenor ASA, the company in the case study, so you can compare your answer with the published run. If the answer shows no Apier tool call, Claude did not use the connector. The table below lists what to check.
What if something goes wrong?
The table lists three problems you may meet and the fix for each.
| What you see | Cause | Fix |
|---|---|---|
| Claude cannot open apier.no, or answers from other websites | The connector is not connected in that chat. | Open Customize, then Connectors, check that Apier is connected, and start a new chat. |
INSUFFICIENT_CREDITS | The key named MCP OAuth connection has no credit. | Add credit to MCP OAuth connection as in step 3. |
| The consent page shows another account | You are signed in to apier.no with a different account. | Sign out of apier.no, sign in with the right account, and connect again. |
How do I remove the connection?
- In claude.ai, open Customize, then Connectors, then Apier, and click Disconnect.
- Open the three-dot menu and click Remove.
- On the Apier dashboard, revoke the key named MCP OAuth connection.
The first two steps remove the connector from Claude. The third step is the one that stops the key at Apier. Do all three when you no longer want Claude to reach apier.no through your account.
What does this guide leave out?
This guide covers one path: claude.ai in the browser with a custom connector. It does not cover other MCP clients, API key authentication, the sign-in flow in technical detail or how to read the tool responses. Those are in the general guide, how to integrate an AI agent with Apier over MCP. Read that guide when you build your own agent or use a client other than claude.ai.
Frequently asked questions
- Does a free Claude account work?
- Yes. A free account at claude.ai allows one custom connector, and the Telenor ASA case study ran on the free plan with this setup.
- What does a lookup cost?
- Lookups are charged per call from prepaid credit, and the minimum top-up is NOK 50. For scale, the Telenor ASA run made 3 tool calls and cost NOK 1.50 in total. The current prices are on the pricing page.
- Do I paste an API key into Claude?
- No. You sign in on apier.no and click Allow. Apier then creates a key named MCP OAuth connection for the connection, and Claude is given access through that sign-in. You never copy a key by hand.
- Why does Claude answer from other websites and not from apier.no?
- The connector is not connected in that chat. Open Customize, then Connectors, check that Apier is connected, and start a new chat.