# dSolve

> dSolve (Felix Paul, https://d-solve.de) designs and develops tailored software: data-driven applications, small SaaS services and websites. Every project dSolve has built is listed in the portfolio at https://d-solve.de/portfolio/. The tools that run on d-solve.de each have their own llms.txt with the complete instructions for AI assistants, an OpenAPI description and an MCP server. An assistant that is given only d-solve.de needs nothing beyond this file and the project's llms.txt to build, store, change and delete a page for a user end to end.

How to proceed: pick the project below, read its llms.txt (the complete instruction: how to work with the user, every parameter, rules), then use its MCP server if you have an MCP client, otherwise its API (OpenAPI), otherwise hand the user the long link described there. Legal pages of the operator: https://d-solve.de/impressum/ (Impressum), https://d-solve.de/datenschutz/ (privacy, German). Contact: https://d-solve.de/contact/

## Portfolio: tools with API and MCP server

- [Valentine Captcha](https://d-solve.de/projects/valentine-captcha/llms.txt): a fake reCAPTCHA that turns into a personalised Valentine, English or German. llms.txt https://d-solve.de/projects/valentine-captcha/llms.txt · API https://d-solve.de/valentine/api · OpenAPI https://d-solve.de/valentine/api/openapi.json · MCP https://d-solve.de/valentine/mcp · UI https://d-solve.de/projects/valentine-captcha/customize/
- [Wohnungssuche (flat search toolkit, German)](https://d-solve.de/projects/apartment-search/llms.txt): personal application page for a flat search, printable poster, tenant self-disclosure with documents; one set of link parameters for all three. llms.txt https://d-solve.de/projects/apartment-search/llms.txt · API https://d-solve.de/apartment-search/api · OpenAPI https://d-solve.de/apartment-search/api/openapi.json · MCP https://d-solve.de/apartment-search/mcp · UI https://d-solve.de/projects/apartment-search/customize/

## Portfolio: UI only (no API, no MCP)

- [Koordinationsleiter](https://d-solve.de/projects/koordinationsleiter/): agility ladder drills as step diagrams and animations, training plans, graphical exercise editor, print/PDF; German and English. Manual (German): https://d-solve.de/projects/koordinationsleiter/docs/
- [Wohnungsalarm Hamburg](https://d-solve.de/projects/apartment-watcher/): new co-operative flats in Hamburg announced in a Telegram group within five minutes; product page and manual (German), sales not open yet.
- [Hamburg Live](https://d-solve.de/projects/hamburg-live/): the best Hamburg webcams without ads.
- [Souterrain 16](https://d-solve.de/projects/souterrain-16/): website of a cashmere boutique in Hamburg (German, English, French).
- [Dönerstag Mainz](https://doenerstag-mainz.d-solve.de/): website of a döner restaurant in Mainz.
- [ReadMyBook](https://github.felix-paul.de/readmybook/), [NECK](https://github.felix-paul.de/NECK/), [Codenight](https://github.felix-paul.de/codenight/), [Unsere Tierwelt](https://github.felix-paul.de/tierpark-websites/UnsereTierwelt.html): educational software, hosted on github.felix-paul.de.

## Site

- [Portfolio](https://d-solve.de/portfolio/): every project with a live preview
- [Contact](https://d-solve.de/contact/): request a project
- [Search](https://d-solve.de/search/)