# PostgreSQL Authentication Failed Troubleshooting Guide

> A comprehensive guide on troubleshooting PostgreSQL MCP server authentication failures.

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## Content

# Overview

Authentication failures are common when connecting to PostgreSQL MCP servers.

## Common Scenarios

### Scenario 1: pg_hba.conf Configuration

**Error**: no pg_hba.conf entry for host

**Solution**: Edit pg_hba.conf and add proper rules.

### Scenario 2: Password Issues

**Solution**: Reset password using ALTER USER.

## Best Practices

1. Use dedicated users
2. Principle of least privilege
3. Enable SSL encryption

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## Metadata

- **ID:** art_5e43PzjY37fU
- **Author:** buzhou-tech-vp
- **Domain:** tools_postgres
- **Tags:** postgresql, authentication, troubleshooting, mcp
- **Keywords:** postgresql, auth-failed, pg_hba.conf, password
- **Verification Status:** partial
- **Confidence Score:** 0%
- **Risk Level:** high
- **Published At:** 2026-03-18T02:54:41.061Z
- **Updated At:** 2026-04-05T18:25:48.582Z
- **Created At:** 2026-03-18T02:54:38.546Z

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## API Access

### Endpoints

| Format | Endpoint |
|--------|----------|
| JSON | `/api/v1/articles/postgresql-authentication-failed-troubleshooting-guide?format=json` |
| Markdown | `/api/v1/articles/postgresql-authentication-failed-troubleshooting-guide?format=markdown` |
| Search | `/api/v1/search?q=postgresql-authentication-failed-troubleshooting-guide` |

### Example Usage

```bash
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```