Belvo (BYOK)

Belvo (BYOK) — connector documentation

• MCP endpoint: https://byok-belvo.connectorbay.com/mcp
• REST API: POST https://byok-belvo.connectorbay.com/v1/tools/{tool_name}, described by the OpenAPI 3.1 spec at https://byok-belvo.connectorbay.com/openapi.json
• Transport: Streamable HTTP, stateless, MCP specification 2025-06-18 or later
• Authentication: your own Belvo Belvo secret ID, sent in the X-Upstream-Key header and the Belvo secret password in X-Upstream-Key-2 of every request (never stored, logged or cached)
• Health: https://byok-belvo.connectorbay.com/health · Tool schemas: https://byok-belvo.connectorbay.com/tools.json
• Publisher: Unify Dynamics LLC · connectorbay.com/byok-belvo · agent@connectorbay.com

What Belvo (BYOK) is for

Belvo (BYOK) lets an AI assistant read your own Belvo data through the Belvo API with a key you supply (Belvo secret ID). Read-only: 9 tools (list_institutions, list_links, list_accounts, list_transactions, list_incomes, list_recurring_expenses, list_risk_insights, list_br_payment_intents, list_br_payment_charges). 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.belvo.com. Unofficial connector by Unify Dynamics LLC: not affiliated with, endorsed by or sponsored by Belvo. Belvo 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:

• "Which Brazilian banks can Belvo connect to right now?"
• "Which of my Belvo links are invalid and need to be reconnected?"
• "What are the balances of the accounts on link 1234?"
• "What did this account spend in the last 30 days?"
• "What is the average monthly income of the user on link 1234?"
• "Which subscriptions and recurring payments does this user have?"

What it does

• list_institutions: List the banks, fiscal and employment institutions Belvo can connect to, with country, type and health status.
• list_links: List the links (end-user connections to an institution) with institution, access mode, status, refresh rate and last access time.
• list_accounts: List bank accounts (checking, savings, credit card, loan) of a link with category, currency, balances and credit limits.
• list_transactions: List transactions of a link, filterable by account, type, status and dates, with amount, currency, description and category.
• list_incomes: List income analysis per link: income source type, monthly averages and totals by regularity and confidence.
• list_recurring_expenses: List recurring expenses detected in a link's transactions with name, frequency, typical amount and category.
• list_risk_insights: List risk insight reports of a link: asset, credit card, loan, balance, cashflow and transaction metrics.
• list_br_payment_intents: List Brazil payment intents (Pix and open finance payment requests) with status, amount, currency and failure details. Read only.
• list_br_payment_charges: List Brazil payment charges with status, amount, currency, payment method type and failure details. Read only.

BYOK key

You bring your own Belvo Belvo secret ID (https://dashboard.belvo.com/). 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.belvo.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://developers.belvo.com/apis/belvoopenapispec (the API this connector calls, with a BYOK key)

Live from the Belvo API (api.belvo.com) with a BYOK key; documentation: https://developers.belvo.com/apis/belvoopenapispec. 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 Belvo. Belvo 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 Belvo account.

Built for: Worldwide. Languages: English.

Belvo (BYOK) — Privacy Policy

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

What Belvo (BYOK) is. Belvo (BYOK) is a connector (an MCP server and REST API) that an AI assistant calls on your behalf to read your own Belvo data: Read your Belvo open finance institutions, links, bank accounts, transactions, incomes, risk insights and Brazil payment records with your own API keys. You bring your own Belvo Belvo secret ID; the assistant sends it to us with each request.

BYOK key. The key you supply is used to make the one Belvo 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.belvo.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 Belvo 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 Belvo receives. The request we make on your behalf, including the key and the arguments, under Belvo's own terms and privacy policy. Belvo acts at your direction and is the only recipient of the data of your request besides our hosting provider.

What we return. The answer Belvo 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 Belvo 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. Belvo (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 Belvo at any time to end all access.

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

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

Belvo (BYOK) — Terms of Service

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

1. The Service. Belvo (BYOK) provides: Read your Belvo open finance institutions, links, bank accounts, transactions, incomes, risk insights and Brazil payment records with your own API keys. 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 Belvo credentials and only access data you are allowed to access. Belvo's terms apply to your use of Belvo; 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 Belvo. Belvo 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 Belvo returns, lightly trimmed; it may be incomplete, delayed or changed by Belvo. Check important facts at the source.
5. Read-only. The Service does not create, change, send or delete anything in your Belvo 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 Belvo'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; Belvo 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 Belvo 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 Belvo 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-belvo

Belvo (BYOK) support

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

• MCP endpoint: https://byok-belvo.connectorbay.com/mcp
• REST API: https://byok-belvo.connectorbay.com/openapi.json
• Live status: https://byok-belvo.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. Belvo (BYOK) never asks for them.