Personas
A reusable character — tone, rules and behaviour bundled so an assistant stays in character all conversation.
Browse personas →MarketplaceHow buying works
Buy AI prompts, personas and agents a person has already checked.
Every listing on Sigrix is reviewed and tested before it goes live. You see the example output, the model and the cost per run before you pay, and what you buy is yours to keep.
What you can buy
Eight kinds of AI building block.
From a single instruction you paste into a chat to an agent that runs a whole workflow.
Prompts
A single, sharp instruction that gets one job done well. Paste it in and run it.
Browse prompts →Skills
A portable capability, written as a SKILL.md, that an assistant or agent loads when a task calls for it.
Browse skills →Assistants
A configured helper for a recurring task — instructions plus context you drop straight into your model.
Browse assistants →Agents
Multi-step automation that takes actions and chains tools. The listing says up front what access it needs.
Browse agents →Crews
A team of AI agents that runs a whole job together, a manager persona routing the work between them.
Browse crews →Products
A ready-to-run bundle: a persona, skills and an assistant or agent packaged as one purchase.
Browse products →MCP Servers
A Model Context Protocol server: a connector that gives your AI client live tools and data.
Browse MCP Servers →Not sure which you need?
The building-blocks guide walks the whole spectrum, from one instruction to a full agent.
Read the guide →How it works
From search to running it in four steps.
Filter by type, use case or price. Anyone can read a listing in full — no account needed.
Every listing shows the model it runs on, an example of what it produces, and the token cost per run — before you pay.
One payment, no subscription. Free listings land in your library straight away.
Copy it out of your library and paste it into the tool you already use. Nothing to install.
Before you pay
Everything you need to judge it is on the page.
Anyone can read a listing in full without signing in.
- The model it runs on Each listing declares its target model, and it is tested on that model before it goes live.
- An example of what it produces Real output, checked by a curator against what you actually get.
- Token cost per run The running cost is on the page, so the price is not the only number you see.
- Any access it needs Some agents connect to outside tools or APIs. The listing tells you what access it needs before you buy.
- Review results Test results and reviewer notes ship with the listing, so you see the same evidence we did.
On every listing
- Model
- Declared + tested
- Example output
- Checked by a curator
- Tokens per run
- Shown before you pay
- Access needed
- Listed before checkout
How we curate
Nothing goes live without a review.
A typical listing spends 1–2 days in review. If we wouldn't use it ourselves, we don't list it.
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.
What you own
Pay once. Keep it.
Sigrix takes a commission from the creator on each sale. There's no subscription on your side.
- A permanent, transferable license Tied to your account. If Sigrix shuts down tomorrow, you still have the files you paid for.
- Access that doesn't expire Everything you buy lives under Purchases in your account, ready to open again any time.
- Refunds when it doesn't deliver If a listing does not work as described, request a refund from your order within 14 days of purchase. A person reviews every request.
- Your keys stay on your machine Agents declare the environment variable names they need through Postern, an open protocol. Credentials never travel through it.
Paying
- Payment
- One-off · no subscription
- Cards
- Major cards, via Stripe
- Free listings
- No payment needed
- Refund window
- 14 days
Card details are handled by Stripe and never touch Sigrix's servers. How accounts and data work →
FAQ
Buying on Sigrix, answered.
Still curious? Read the full FAQ or the buyer guides in Sigrix Learn.
You can explore the marketplace without an account, but you'll need to sign in to purchase or publish.
Select a listing, review the details, and complete checkout. You'll receive access instructions immediately.
Sigrix supports major credit cards and region-specific payment options through Stripe, our checkout provider.
Access links appear in your purchase receipt and in the dashboard with any setup steps from the creator.
Refunds are available only if a Product does not function as described. Contact support within 14 days of purchase and include supporting evidence. If approved, refunds are issued via Stripe promptly; depending on your bank, the credit may take 5–10 business days to appear.
Creators will list any read/write access needs up front so you can prepare before purchase.
Every listing goes through a quality check for clarity, safety, and completeness before it appears in the catalog.
Get started
Find something that already works.
Browse without an account. Sign in only when you want to buy.
One-off payments · 14-day refunds · access doesn't expire