Overview

FeelConnect is a financial data platform. Your users connect their bank, payment-app, investment, and crypto accounts through a single Link flow; you read normalized data and AI enrichment through a single /v1 API.

Every endpoint is POST with a JSON body and secret-key bearer auth. Data shapes are stable, typed, and identical across the 11 official SDKs.

What you can build on

• Link — an embeddable modal that handles institution search, OAuth, credentials, MFA, account selection, and consent. See Link.
• Core data products — accounts, balances, transactions (cursor sync), identity, income, assets, investments, liabilities, recurring streams. See the API reference.
• AI products — nine enrichment endpoints (categorization, subscription detection, cash-flow forecasting, health score, fraud signals, and more) that work with an access_token or a raw payload. See AI products.
• Webhooks — signed event deliveries with automatic retries. See Webhooks.
• GraphQL — an optional read gateway over the same data. See GraphQL.
• MCP — a Model Context Protocol server so AI agents can call FeelConnect as tools. See MCP and AI agents.

How a connection works

The flow is three server calls and one frontend embed. Your server never sees user credentials; Link returns a short-lived public_token that you exchange for a persistent access_token.

# 1. server: create a link_token
curl https://api.feelconnect.dev/v1/link/token/create \
  -H "Authorization: Bearer $FEELCONNECT_SECRET_KEY" \
  -H "Content-Type: application/json" \
  -d '{"user":{"client_user_id":"user-123"},"products":["transactions","balances"]}'

# 2. frontend: FeelConnect.open({ linkToken, onSuccess }) -> public_token

# 3. server: exchange for an access_token
curl https://api.feelconnect.dev/v1/link/token/exchange \
  -H "Authorization: Bearer $FEELCONNECT_SECRET_KEY" \
  -H "Content-Type: application/json" \
  -d '{"public_token":"<from Link onSuccess>"}'

# 4. server: read data forever after
curl https://api.feelconnect.dev/v1/transactions/sync \
  -H "Authorization: Bearer $FEELCONNECT_SECRET_KEY" \
  -H "Content-Type: application/json" \
  -d '{"access_token":"fc_at_..."}'

Connector network

FeelConnect routes each institution to the best available connector: a fully simulated sandbox network (always on), manual CSV/OFX/QFX import, evm-wallet public-address crypto tracking, and upstream aggregators (Plaid, MX, Finicity, Akoya, GoCardless, Stripe Financial Connections, Coinbase, Kraken, PayPal, Wise) that activate per deployment. The connector is an implementation detail — the API shape never changes.

Where to start

• Quickstart — keys to synced transactions in about ten minutes.
• Authentication — how keys, environments, and request IDs work.
• API explorer — run real sandbox calls from the browser.
• Errors and rate limits — what to handle in production.