Column (BYOK)

Column (BYOK) — connector documentation

• MCP endpoint: https://byok-column.connectorbay.com/mcp
• REST API: POST https://byok-column.connectorbay.com/v1/tools/{tool_name}, described by the OpenAPI 3.1 spec at https://byok-column.connectorbay.com/openapi.json
• Transport: Streamable HTTP, stateless, MCP specification 2025-06-18 or later
• Authentication: your own Column Column API key (used as the Basic-auth password with an empty username), sent in the X-Upstream-Key header of every request (never stored, logged or cached)
• Health: https://byok-column.connectorbay.com/health · Tool schemas: https://byok-column.connectorbay.com/tools.json
• Publisher: Unify Dynamics LLC · connectorbay.com/byok-column · agent@connectorbay.com

What Column (BYOK) is for

Column (BYOK) lets an AI assistant read your own Column data through the Column API with a key you supply (Column API key (used as the Basic-auth password with an empty username)). Read-only: 11 tools (list_bank_accounts, get_bank_account, get_bank_account_history, list_transfers, list_ach_transfers, list_wire_transfers, list_book_transfers, list_events, get_institution, list_loans, list_settlement_reports). The BYOK key travels with each request, is used for that one call only and is never stored, logged or cached; it is only ever sent to api.column.com. Unofficial connector by Unify Dynamics LLC: not affiliated with, endorsed by or sponsored by Column. Column and its logos are trademarks of their owners and are used only to say which service the connector works with.

Ask your assistant things like:

• "What are my Column bank account balances?"
• "What is the balance of this Column bank account?"
• "Show daily balance history of this Column account for September 2026"
• "Which transfers happened on my Column account this week?"
• "List recent ACH transfers on Column"
• "List recent wire transfers on Column"

What it does

• list_bank_accounts: List bank accounts of the platform with display name, status, type, currency, routing number and balances (available, pending, holding, locked, in cents).
• get_bank_account: Get one bank account with balances (in cents), status, type and currency.
• get_bank_account_history: Get daily summaries of a bank account for a date range: closing, credit and debit amounts per balance type and transaction counts.
• list_transfers: List transfers of every type (ACH, wire, book, realtime, check, SWIFT) with amount, status, direction and dates, with many filters.
• list_ach_transfers: List ACH transfers with amount (in cents), status, direction, description and dates, newest first. Read-only.
• list_wire_transfers: List wire transfers with amount (in cents), status, direction, description and dates, newest first. Read-only.
• list_book_transfers: List book (internal between Column accounts) transfers with amount (in cents), status, direction, description and dates, newest first. Read-only.
• list_events: List account events (transfer status changes and other activity) with type and time, newest first.
• get_institution: Look up a financial institution by ABA routing number: name, address and which rails it supports (ACH, wire, realtime, check).
• list_loans: List loans with status, type, balances, maturity date and program.
• list_settlement_reports: List settlement reports (statements and exports) with type, date range, status and row count.

BYOK key

You bring your own Column Column API key (used as the Basic-auth password with an empty username) (https://dashboard.column.com/settings/api-keys). Your assistant sends it in the X-Upstream-Key header with each request. ConnectorBay uses it for that one call only: it is never stored, logged or cached, never shown in an answer, and it is only sent to api.column.com over https, with no redirects followed. Create a key with the fewest permissions the tools need (read-only if the provider offers it), and revoke it at the provider whenever you like.

Data sources

• https://column.com/docs/api (the API this connector calls, with a BYOK key)

Live from the Column API (api.column.com) with a BYOK key; documentation: https://column.com/docs/api. Endpoints checked against that documentation on 2026-10-16.

What it is not

Unofficial connector by Unify Dynamics LLC: not affiliated with, endorsed by or sponsored by Column. Column and its logos are trademarks of their owners and are used only to say which service the connector works with. It is read-only: it never creates, changes, sends or deletes anything in your Column account.

Built for: Worldwide. Languages: English.

Column (BYOK) — Privacy Policy

Effective 24 October 2026. Unify Dynamics LLC ("we", "us"), Menlo Park, California.

What Column (BYOK) is. Column (BYOK) is a connector (an MCP server and REST API) that an AI assistant calls on your behalf to read your own Column data: Read your Column bank accounts, balances, transfers, loans, events and settlement reports (read-only) with your own API key. You bring your own Column Column API key (used as the Basic-auth password with an empty username); the assistant sends it to us with each request.

BYOK key. The key you supply is used to make the one Column call you asked for. Our application does not store it, write it to a log, put it in a cache, or share it. It is sent only to api.column.com, over https, and is removed from any text we return to you or your assistant. We do not follow redirects with your key. If Column rejects it, we say so without repeating it.

What we receive. The arguments of each tool call, the BYOK key (for that call only), the technical headers needed to serve the request (an IP address or a client identifier supplied by the assistant) and standard server logs. What Column receives. The request we make on your behalf, including the key and the arguments, under Column's own terms and privacy policy. Column acts at your direction and is the only recipient of the data of your request besides our hosting provider.

What we return. The answer Column gives for your request, trimmed to the fields the tool documents. We do not keep it: it is returned to your assistant and not stored, cached or used to train anything.

What we do not do. We do not build a profile, sell or share personal information, or keep your Column data. Rate-limit counters (a client identifier and timestamps) are held in memory for at most 24 hours. Hosting access logs (IP addresses, request paths and status codes) are kept for up to 30 days for security and abuse prevention; our application adds no request headers or bodies to them.

Sub-processors. Column (the API you call with a BYOK key, at your direction). Hosting: Vercel (United States regions).

Your rights. Because we store no personal data beyond short-lived logs, requests to access, correct or delete data are usually satisfied automatically; you can still contact agent@connectorbay.com and we will respond within 30 days. Revoke your key at Column at any time to end all access.

Children. Column (BYOK) is a general-audience service operated by the adult using the assistant, under Column's own age rules.

Changes. We will post changes here with a new effective date.

Column (BYOK) — Terms of Service

Effective 24 October 2026. These terms govern use of the Column (BYOK) connector ("the Service") operated by Unify Dynamics LLC ("we", "us").

1. The Service. Column (BYOK) provides: Read your Column bank accounts, balances, transfers, loans, events and settlement reports (read-only) with your own API key. It is accessed through an AI assistant or directly over MCP or HTTP, and is read-only.
2. Your own key, your own account. You must use your own Column credentials and only access data you are allowed to access. Column's terms apply to your use of Column; you are responsible for complying with them, including any rate limits and permitted uses. Do not share a key you do not own.
3. Independent. Unofficial connector by Unify Dynamics LLC: not affiliated with, endorsed by or sponsored by Column. Column and its logos are trademarks of their owners and are used only to say which service the connector works with.
4. No advice, no guarantees. Output is the data Column returns, lightly trimmed; it may be incomplete, delayed or changed by Column. Check important facts at the source.
5. Read-only. The Service does not create, change, send or delete anything in your Column account.
6. Acceptable use. Automated use within the published rate limits is welcome. Do not use the Service to access data you are not entitled to, to circumvent Column's controls, or to attack any system.
7. Availability. The Service is provided "as is" without warranty. We may change, limit or discontinue it at any time; Column may change or end its API at any time.
8. Data. Our Privacy Policy describes what we process. In short: the BYOK key is used for the one call and not stored or logged.
9. Pro keys. Optional ConnectorBay Pro API keys are issued at our discretion and are separate from your Column key.
10. Liability. To the fullest extent permitted by law, Unify Dynamics LLC is not liable for any loss arising from use of or reliance on the Service, including any action Column takes on your account. Our total liability is limited to US $100.
11. Governing law. California law; venue in San Mateo County, California.
12. Contact. Unify Dynamics LLC · agent@connectorbay.com · https://connectorbay.com/byok-column

Column (BYOK) support

Email agent@connectorbay.com. We answer within two business days.

• MCP endpoint: https://byok-column.connectorbay.com/mcp
• REST API: https://byok-column.connectorbay.com/openapi.json
• Live status: https://byok-column.connectorbay.com/health

When you report a problem, include the question you asked your agent, roughly when, and which agent you used (for example Claude, ChatGPT or Gemini). Never send us passwords, account numbers or ID numbers. Column (BYOK) never asks for them.