--- title: "The PgBeam blog" description: "How PgBeam gives AI agents scoped, audited access to Postgres, and how the proxy that enforces it is built." canonical: "https://pgbeam.com/blog" last-updated: "2026-09-14T19:37:21.000Z" --- # The PgBeam Blog > How PgBeam gives AI agents scoped, audited access to Postgres, and how the proxy that enforces it is built. Start with [Launching PgBeam](https://pgbeam.com/blog/launching-pgbeam) for what the product is, and [Why I Built PgBeam](https://pgbeam.com/blog/why-i-built-pgbeam) for where it came from. URL: https://pgbeam.com/blog ## Posts ### A Field Guide to Least-Privilege Database Access for AI Agents Sep 1, 2026 by Alexis Rico Least privilege is an old principle with a new urgency now that the principal is an autonomous agent. Here is the practical sequence for granting an agent the minimum database access it needs, and nothing more. URL: https://pgbeam.com/blog/least-privilege-database-access-for-ai-agents Markdown: https://pgbeam.com/blog/least-privilege-database-access-for-ai-agents.md ### Safe Migrations for Agents and Humans Aug 27, 2026 by Alexis Rico A schema migration can take an exclusive lock on a hot table or rewrite millions of rows. PgBeam lints the migration before it runs, catches the dangerous patterns, and warns or blocks with a preview and fix hints. URL: https://pgbeam.com/blog/safe-migrations-for-agents-and-humans Markdown: https://pgbeam.com/blog/safe-migrations-for-agents-and-humans.md ### Stream Your Database Audit Log to Splunk, Datadog, and Elastic Aug 21, 2026 by Alexis Rico Every query an agent runs is recorded. Webhook and SIEM export get those events out of PgBeam and into the systems your team already watches: fire a webhook when a query is blocked, and pipe the full log to your SIEM. URL: https://pgbeam.com/blog/stream-your-audit-log-to-your-siem Markdown: https://pgbeam.com/blog/stream-your-audit-log-to-your-siem.md ### Anomaly Detection on Database Access Aug 15, 2026 by Alexis Rico A credential has a normal pattern: how much it queries, when, and what shapes of query it runs. PgBeam learns that baseline and flags the moment a credential drifts from it, which is often the first sign something is wrong. URL: https://pgbeam.com/blog/anomaly-detection-on-database-access Markdown: https://pgbeam.com/blog/anomaly-detection-on-database-access.md ### Always-Rollback Mode: True Dry-Run for Agent Writes Aug 9, 2026 by Alexis Rico Sometimes you want an agent to run a write, see exactly what it does, and have nothing persist. Always-rollback mode runs the statement inside a transaction PgBeam never commits. URL: https://pgbeam.com/blog/always-rollback-dry-run Markdown: https://pgbeam.com/blog/always-rollback-dry-run.md ### Instant Branches: Let an Agent Write to a Throwaway Copy of Production Aug 3, 2026 by Alexis Rico Read-only keeps an agent off your data by refusing every write. Instant branches are the safe-write counterpart: hand the agent an isolated branch of the database, let it write freely, then discard it. URL: https://pgbeam.com/blog/instant-branches-throwaway-copy Markdown: https://pgbeam.com/blog/instant-branches-throwaway-copy.md ### SCRAM for Agent Credentials: Stop Sending Passwords Over the Wire Jul 28, 2026 by Alexis Rico TLS encrypts the channel, but the password still crosses it. SCRAM-SHA-256 proves the credential without ever transmitting the secret, which is the standard you want for any credential, and especially for one held by an agent. URL: https://pgbeam.com/blog/scram-for-agent-credentials Markdown: https://pgbeam.com/blog/scram-for-agent-credentials.md ### Launching PgBeam: Safe Postgres for AI Agents Jul 25, 2026 by Alexis Rico Your agent does not need your superuser connection string. PgBeam issues a scoped one, enforces read-only access, allowlists, PII masking, and budgets in the Postgres wire protocol, and records every statement. Any Postgres, no code changes. URL: https://pgbeam.com/blog/launching-pgbeam Markdown: https://pgbeam.com/blog/launching-pgbeam.md ### Human-in-the-Loop Approvals for Agent Writes and DDL Jul 22, 2026 by Alexis Rico Some agent actions are too consequential to autorun and too useful to forbid. Hold the write or the DDL in a queue, let a human approve it in the dashboard, and auto-approve the cases that are obviously safe. URL: https://pgbeam.com/blog/human-in-the-loop-approvals Markdown: https://pgbeam.com/blog/human-in-the-loop-approvals.md ### Query Budgets and Kill-Switches: Blast-Radius Control for Agents Jul 16, 2026 by Alexis Rico An agent in a loop can hammer your database all night. A budget turns that into a bounded event. A kill-switch turns it off in one click. Together they cap the worst case before it becomes an incident. URL: https://pgbeam.com/blog/query-budgets-and-kill-switches Markdown: https://pgbeam.com/blog/query-budgets-and-kill-switches.md ### Column Masking and PII Protection for AI Workloads Jul 11, 2026 by Alexis Rico An AI agent that reads a customer table does not need the raw email, phone number, or card. Column masking redacts, nulls, or hashes sensitive values in flight, so the model sees data it can still work with but never the real thing. URL: https://pgbeam.com/blog/column-masking-for-ai Markdown: https://pgbeam.com/blog/column-masking-for-ai.md ### Row-Level Policies: Giving a Principal a Slice of a Table Jul 6, 2026 by Alexis Rico Table and column allowlists decide which columns a credential can touch. Row-level policies decide which rows. PgBeam appends a WHERE predicate to every query so the principal only ever sees the rows you allow. URL: https://pgbeam.com/blog/row-level-policies-a-slice-of-a-table Markdown: https://pgbeam.com/blog/row-level-policies-a-slice-of-a-table.md ### Hosted MCP vs Handing an Agent Raw Credentials Jul 1, 2026 by Alexis Rico You can give an agent a database connection string, or a hosted MCP endpoint. Both work. One of them gives the agent structured tools and a policy boundary instead of a raw socket. URL: https://pgbeam.com/blog/hosted-mcp-vs-raw-credentials Markdown: https://pgbeam.com/blog/hosted-mcp-vs-raw-credentials.md ### Read-Only by Default: The Safest Credential You Can Give an AI Jun 25, 2026 by Alexis Rico Most agents only need to read. A read-only credential makes every INSERT, UPDATE, DELETE, and DDL impossible at the wire, which removes an entire class of agent failures before it can happen. URL: https://pgbeam.com/blog/read-only-by-default Markdown: https://pgbeam.com/blog/read-only-by-default.md ### The Connection String You Can Paste Into Anything Jun 20, 2026 by Alexis Rico Claude Code, Cursor, LangChain, psql, a Python notebook: they all speak Postgres. A guarded PgBeam connection string drops into every one of them, with the policy attached and nothing to install. URL: https://pgbeam.com/blog/the-connection-string-you-can-paste-anywhere Markdown: https://pgbeam.com/blog/the-connection-string-you-can-paste-anywhere.md ### The Proxy Is the Right Place to Make Agent Database Access Safe Jun 15, 2026 by Alexis Rico An AI agent needs real database access to be useful and real guardrails to be safe. The PostgreSQL wire protocol is the one layer where you can enforce both, for any database, with zero code changes. URL: https://pgbeam.com/blog/the-proxy-is-the-place Markdown: https://pgbeam.com/blog/the-proxy-is-the-place.md ### All You Need Is a Monorepo and Guardrails Mar 15, 2026 by Alexis Rico Most of PgBeam's 140,000-line codebase was written by AI agents. The setup that makes this work is simpler than you'd expect: a monorepo, a rules file, and a persistent knowledge base. URL: https://pgbeam.com/blog/monorepo-and-guardrails Markdown: https://pgbeam.com/blog/monorepo-and-guardrails.md ### Contract-First API Development with OpenAPI Mar 12, 2026 by Alexis Rico PgBeam's entire API surface is generated from a single OpenAPI spec: Go server types, route registration, TypeScript SDK, and interactive documentation. Here's how the pipeline works. URL: https://pgbeam.com/blog/contract-first-api-development Markdown: https://pgbeam.com/blog/contract-first-api-development.md ### How PgBeam's Query Cache Works Mar 10, 2026 by Alexis Rico How PgBeam's query caching works: L1 process-local cache, optional L2 shared cache, stale-while-revalidate semantics, and cache key computation. URL: https://pgbeam.com/blog/how-pgbeam-query-cache-works Markdown: https://pgbeam.com/blog/how-pgbeam-query-cache-works.md ### Why Your Vercel Functions Are Stuck in One Region Mar 5, 2026 by Alexis Rico Vercel Functions can deploy to 20 regions. Most teams deploy to one, because their database is in us-east-1. The problem was never compute distribution. It was always the data layer. URL: https://pgbeam.com/blog/connection-pooling-vercel Markdown: https://pgbeam.com/blog/connection-pooling-vercel.md ### Why I Built PgBeam Feb 19, 2026 by Alexis Rico PgBeam decides what an AI agent is allowed to do with your Postgres. It did not start there: it started as a proxy for cross-region latency, and the same proxy turned out to be the only honest place to put the rules. URL: https://pgbeam.com/blog/why-i-built-pgbeam Markdown: https://pgbeam.com/blog/why-i-built-pgbeam.md