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ConceptOpen-source proxy for per-tenant Postgres, no app changes

Can a zero-code proxy route Postgres queries to per-tenant d

Author · MicroValidator Last updated Who this is for Solo developer or small team building a B2B SaaS with strict data isolation requ

Core takeaway / TL;DR

The most worthwhile experiment is a one-week build-and-publish test: create a mi

Suggested next step Run a one-week experiment: build a minimal header-based rout

The most worthwhile experiment is a one-week build-and-publish test: create a mi

Next experiment

Run a one-week experiment: build a minimal header-based rout

Best thing to validate

Solves a real pain for multi-tenant SaaS developers who need data isolation with

Biggest risk

The assumption that developers will trust a proxy for production data and that t

Critical assumption (summary)

Developers need per-tenant isolation but are unwilling to change their application code.

Show objections and continue/stop

Strongest objection

Existing solutions like row-level security or schema-per-tenant with connection pooling already work; a proxy adds compl

Continue if

If interviews reveal that app changes are not a major pain point or that existing solutions are acceptable, pivot to a d

Pivot if

If no one expresses sufficient pain or interest, stop and explore other opportunities.

Show score rationale

The keyword suggests a pain point, but it may be niche and unproven.

Fill the critical gaps (max 2)

“I don’t know” is fine — we give how to get evidence; we never invent interviews or payments.

Q: Is there real demand for a proxy that eliminates app changes for per-tenant Postgres?

Without evidence that developers face this pain and see the proxy as a solution, the product may be solving a nonexisten

How to get evidence: Conduct 5-10 interviews with developers building multi-tenant SaaS; ask about current methods for data isolation, difficulties, and whether they would try a pro

Q: Would developers pay for a hosted version or rely only on self-hosted open-source?

A micro-SaaS needs a revenue path; if no one pays, the business model fails.

How to get evidence: After validating interest, test pricing by offering a hosted beta or pre-order on a landing page; observe sign-ups and conversion.

02 Where the signal came from

Raw keyword

Open-source proxy for per-tenant Postgres, no app changes

Discovery channel

Hacker News

Source note

Hacker News Show HN · 产品向标题线索，非需求证明

04 Business breakdown

Who needs this

Solo developer or small team building a B2B SaaS with strict data isolation requirements.

Job to be done

Route database queries to the correct tenant's Postgres instance without modifying application code.

Why they might pay

Saves development time and reduces risk of cross-tenant data leaks.

Alternatives

Row-level security, schema-per-tenant with connection pooling, custom middleware, or using a database proxy like PgBouncer with manual routing.

Differentiation wedge

A minimal open-source proxy that reads a tenant ID from a header and routes to the correct database; later, add a hosted version.

OPC scope

Minimal proxy that reads a tenant ID from an HTTP header and routes SQL queries to the correct Postgres database; supports two databases for demo.

Open questions

  • How do developers currently handle per-tenant routing?
  • What is the acceptable latency overhead?
  • Do they need multi-region support?

05 Search & acquisition

Primary channel:

Developer forums, Hacker News, GitHub, Reddit r/PostgreSQL

Click a keyword to copy. Tags: AI candidate / queried / thin sample.

Talking points

  • Achieve data isolation without rewriting your app
  • Drop-in proxy for per-tenant Postgres
  • Open-source, self-hostable

Minimum experiment 06 Minimum validation experiment

One falsifiable step before you continue or stop.

Valid signal = real task completion, reuse, or pay intent — with observe + continue/stop.

Build a minimal proxy that reads a tenant ID from an HTTP header and routes queries to two Postgres databases.

Observe

Does the proxy correctly route queries? What is the latency overhead compared to direct connections?

Continue

Routing works with a simple test app and latency is acceptable (<10ms overhead).

Stop

Technical issues show the proxy is infeasible or latency is unacceptable.

Publish the proxy on GitHub with a README explaining the problem, usage, and limitations. Write a short blog post and share it on Hacker News and relevant subreddits.

Observe

Number of GitHub stars, issues, comments, and any sign-ups for a hosted version (if a landing page is added).

Continue

There is meaningful engagement (e.g., >50 stars, multiple issues, or sign-ups).

Stop

No engagement after one week.

Collect feedback from any interested developers via GitHub issues or a simple survey.

Observe

What specific use cases and pain points emerge? Do they express willingness to pay?

Continue

Feedback confirms the pain and suggests a viable wedge.

Stop

Feedback is lukewarm or indicates existing solutions are sufficient.

FAQ

Should I keep building this idea?

The most worthwhile experiment is a one-week build-and-publish test: create a mi

What is the smallest next experiment?

Run a one-week experiment: build a minimal header-based rout

What is the biggest risk right now?

The assumption that developers will trust a proxy for production data and that t

Who is this validation for?

Solo developer or small team building a B2B SaaS with strict data isolation requirements.

How should I read the score?

Current OPC feasibility score is 5/100. It is an AI-assisted executability check, not a market guarantee. Low scores mean “prove demand first,” not “never build.”

07 Evidence & boundaries

Demand evidence summary

No external evidence collected. The keyword alone does not prove demand; interviews and usage tests are required.

External record

None

User-stated

None

Model hypothesis

  • Multi-tenant SaaS developers may have a pain point in managing per-tenant Postgres connections and routing.
  • Existing alternatives (row-level security, schema-per-tenant) may be seen as insufficient for strict isolation or require significant app changes.

Known facts

  • Postgres is a popular database for SaaS applications.
  • Multi-tenancy is a common requirement for B2B SaaS.

Unverified assumptions

  • Developers prefer not to change application code for database routing.
  • A proxy can route queries without significant overhead.

AI inference: The keyword suggests a pain point, but it may be niche and unproven.

Advanced: one-click frontend skeleton

Turn this idea into a single-file HTML MVP (Tailwind CDN + core interaction mock).