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# neon database configuration
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configuration guide for connecting to neon postgres databases.
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## overview
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plyr.fm uses [neon](https://neon.tech) for all database environments (dev, staging, prod). neon uses a specialized proxy architecture that requires specific connection settings for security and reliability.
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## connection string format
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the connection string must use the **psycopg** driver and include specific ssl parameters.
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### format
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```bash
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postgresql+psycopg://<user>:<password>@<host>/<dbname>?sslmode=require&channel_binding=require
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```
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### key components
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1. **driver**: `postgresql+psycopg://`
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- **required**: we must use the `psycopg` (v3) driver, not `asyncpg`.
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- **reason**: `asyncpg` does not support the `channel_binding` parameter, which is required for strict ssl verification with neon.
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2. **ssl mode**: `sslmode=require`
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- forces ssl encryption for the connection.
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3. **channel binding**: `channel_binding=require`
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- ensures the connection is not intercepted (mitm protection).
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- uses SCRAM-SHA-256-PLUS authentication.
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## environment variables
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set the `DATABASE_URL` in your `.env` file:
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```bash
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# development (example)
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DATABASE_URL=postgresql+psycopg://<user>:<password>@<host>/<dbname>?sslmode=require&channel_binding=require
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```
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## troubleshooting
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### typeerror: connect() got an unexpected keyword argument 'channel_binding'
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**cause**: using `postgresql+asyncpg://` with `channel_binding=require`.
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**fix**: change the scheme to `postgresql+psycopg://`.
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### connection refused / ssl errors
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**cause**: missing `sslmode=require` or `channel_binding=require`.
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**fix**: ensure both parameters are present in the query string.
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## references
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- [neon documentation](https://neon.tech/docs)
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- [sqlalchemy psycopg dialect](https://docs.sqlalchemy.org/en/20/dialects/postgresql.html#module-sqlalchemy.dialects.postgresql.psycopg)