Prompts
Single-instruction templates that produce a specific output: a draft, an analysis, a reformat. Drop in, fill the variables, run.
ExamplesCold-email rewriter · Q4 OKR draft · CSV → SQL
CompanyAbout
A curated marketplace for vetted AI building blocks.
Independent creators publish prompts, personas, skills, assistants, and agents. We test every listing before it goes live — so the person at the keyboard spends time using AI, not debugging it.
What Sigrix sells
Five building blocks, from one-line prompt to autonomous agent.
A taxonomy that follows complexity. Pick the smallest unit that solves your problem — most people need a prompt, not an agent. Mix and match as your workflow grows.
Personas
System prompts that give a model a stable role, tone, and worldview — so a generic chat surface acts like a senior editor or a tax advisor.
ExamplesPlain-English lawyer · Patient brand voice
Skills
Composable mini-capabilities you bolt onto an existing assistant — a calculator, a citation checker, a tone enforcer — to extend what it can do.
ExamplesAPA citations · Code-block sanitiser
Assistants
Persona + skills + memory, packaged as a working tool with a defined surface area. Hire one for a job; it stays in scope.
ExamplesWeekly review coach · Research notebook
Agents
Multi-step systems that plan, call tools, and keep going until a goal is met. The most powerful tier — and the one that needs the most scrutiny.
ExamplesInbox triage · Competitor monitor
Our mission
Empower people to harness AI responsibly & creatively.
AI can only go as far as the people using it understand and guide it. Sigrix exists to close that gap — verified components, plain-English documentation, and discovery that matches the buyer instead of the highest bidder.
- Verified quality. Every listing tested before publication.
- Honest education. We teach the limits, not just the wins.
- Creator upside. Independent makers keep credit and reduced commission.
- Fit-based discovery. Ranking matches the buyer, not the bidder.
- Transparent surfaces. Show the prompt, the model, the token cost.
From the creator
Hi, I'm Fedir — I build Sigrix as a one-person studio.
My day job is data engineering in financial-services risk. I started out as a practicum student in IT, moved through IT support, and spent the better part of a decade in banking technology — first as a project officer, then a climate-risk business analyst, and now building the data pipelines behind mortgage risk models. The through-line is the same: take something messy and undocumented and turn it into a system people can actually trust.
I started Sigrix because I kept watching people pay for AI tools they couldn't get to behave — copying prompts off forums, hitting walls with agents that quietly failed, and giving up on workflows that should have been five minutes of work. The technology is here. The curation isn't. So I'm applying the same instincts I use on risk data — provenance, reproducible tests, no black boxes — to a marketplace of AI building blocks I'd actually want to buy from, with creators kept in the loop instead of mined for IP.
Outside of code I'm an artist — I've had several solo exhibitions — and what I like most is making things from nothing. Sigrix is exactly that: built from scratch, curated by hand, one listing at a time.
Fedir · Founder of Sigrix
Solo · Building since 2025
Kraków · Data engineer by day · Replies in 24h · @sigrix
Strategic advisor
Hi, I'm Aga — Strategic Development Partner at Sigrix.
I joined because I kept seeing the same pattern. Organisations invest in AI tools, hand them to their teams, and wonder why nothing changes. The technology works. The understanding doesn't.
Fifteen years working across startups, SMEs, and large multinational corporations in transformation and change management taught me that tools only deliver when people know how to direct them. Prompts are no different — the gap isn't access, it's guidance.
What Sigrix is building is the thing I couldn't find elsewhere: a marketplace where every listing is actually verified, a co-creation model that respects the people building it, and an education module that doesn't just hand you a prompt — it helps you understand why it works.
That combination is what brought me here. I'm responsible for the strategy, the communications, and making sure the platform grows in a way that stays true to what we set out to build.
Strategy
Communications
Transformation & change
Education program
Aga · Strategic Development Partner
Strategy · Communications · Education
15+ yrs transformation · Startups · SMEs · Multinationals · Change management
Startup program
Sigrix is a member of Anthropic's startup program.
How we curate
From submission to shelf in five steps.
Curation is the product. A typical listing spends 1–2 days in review. Test results and reviewer notes ship with the listing, so buyers see the same evidence we did.
01 · Submit
Creator submits
Prompts, personas, or assistants come in with examples, model targets, and a signed creator agreement.
02 · Review
Editorial review
We read every listing for clarity, scope, and honesty about what it can — and can't — do.
03 · Test
Functional test
Each listing is run against a fixed test set on the declared model. Output is graded for accuracy and consistency.
04 · Verify
Safety + IP check
We screen for prompt-injection traps, unsafe outputs, and copied work. Failed checks come back with feedback.
05 · Publish
Goes live
Approved listings publish with a verified badge, full provenance, and the test results visible to buyers.
Founding seller program
We're live. Join the founding cohort.
Sigrix opened on May 15, 2026. A limited number of founding seats are still open — claim yours and keep the perks for life.
- Founding badge — permanent, distinct from the standard badge, visible to every buyer.
- Featured Placement — top of discovery at the platform's highest-value launch moment.
- First-Mover Advantage — less competition and a head start on reputation that compounds.
- Reduced Commission — 15% instead of the standard 20%, locked for the life of your account.
Founding seats
5 open
Seats close when the founding cohort fills. Every perk is locked for life.
Digital ownership
Creators own their work. Buyers own what they bought.
Listings are licensed, not absorbed. Sigrix takes a commission on the sale — that's the entire commercial relationship. We don't claim a perpetual license to your prompts, train models on them, or sublicense them to anyone else.
Buyers receive a permanent, transferable license tied to their account. If Sigrix shuts down tomorrow, you still have the files you paid for. See how it works →
The mechanism behind that is published, not ours to keep. Postern is the open protocol an agent uses to check the person running it is entitled to — drafted in the open under Apache-2.0, with Sigrix as one implementation of it rather than the definition. Credentials never travel through it: an agent declares the environment variable names it needs, so "your keys stay on your machine" is checkable instead of promised.
Creator
Owns the IPOriginal work, full copyright retained.
100%
licenses to ↓
Sigrix
MarketplaceHosts, vets, and routes payment. Takes commission only.
15–20%
licenses to ↓
Buyer
Permanent licenseTied to account. Files retained on shutdown.
Forever
Get started
Three doors in. Pick the one that fits.
Browse the marketplace for AI agents, prompts, and assistants as a buyer, publish your work as a creator, or apply to the founding seller program for permanent perks. Every direction makes the marketplace better for the next person.