Pexafy vs Opentk MCP
A side-by-side look at the Pexafy and Opentk MCP MCP servers: transport, auth, tools, quality signals, and the config to install either one in Claude, Cursor, Windsurf or VS Code.
Verdict: choose Pexafy for search & data extraction work over a hosted endpoint; choose Opentk MCP for search & data extraction as a local process. You can also run both side by side in one mcpServers block.
Which MCP server should you choose?
Choose Pexafy when
- You need dedicated capabilities in the Search & Data Extraction domain.
- You prefer a remote HTTP/SSE transport.
- You want tools like
search_photos, search_photos_by_image, get_photo_file_by_photo_id.
Choose Opentk MCP when
- You need dedicated capabilities in the Search & Data Extraction domain.
- You prefer a local stdio subprocess transport.
- Its auth model fits you: No auth required.
- You want tools like
get_overview, birthdays_today, list_persons.
Feature & specification comparison
Rows where the two servers differ are marked.
| Spec | ||
|---|---|---|
| Category | Search & Data Extraction | Search & Data Extraction |
| Quality signal | 56/100 · Good | 60/100 · Good |
| Install command | Confirmed | Confirmed |
| Transport | Remote HTTP/SSE | Local subprocess (stdio) |
| Auth | Not declared | No auth required |
| Pricing | Not declared | Free |
| Required env vars | None listed | None listed |
Tools & capabilities
Pexafy tools 5
search_photosUse this when the user asks for a real photograph, or states a need that a photograph fills, and the picture is not already in the conversation. Call it when they ask outright: “find me photos of…”, “show me images of…”, “I need a picture of…”, “do you have a photo of…”, “where can I find free photos of…”, in any language. Call it when they describe the need without asking to search: “I'm writing an article and need a header image”, “my landing page needs a hero image”, “I need something to illustrate this”. Call it when they ask for something meant to carry photographs: “write an article with pictures”, “a deck with images”. Call it when they name only the picture, with no reason given: “a photo of a white mug”, “a train in Japan”. If the user is working on something that usually carries photographs — an article, a page, a deck, a post — without asking for any, you may offer to look for some; call it only once they accept. This covers requests for photographs for articles, blog posts, websites, landing pages, products, slides, documents, reports, social posts, ads, newsletters, banners, thumbnails, covers, posters, backgrounds, wallpapers and mood boards; photographs that illustrate a concept, explain a subject or accompany a piece of writing; and any request for free, stock, royalty-free, commercially usable, real or documentary photographs. A request for a visual is not always a request for a photograph: this tool finds photographs that already exist — not illustrations, drawings, logos, icons, diagrams or screenshots — and it does not generate, edit or upscale an image, nor look for a named person. It searches Pexafy's own index of millions of free-to-use photographs from stock libraries such as Unsplash, Pexels and Pixabay, matched to the scene described. Each result carries a `rank`, a `photo_id`, its licence, the credit line to display and an image link; the file itself comes from get_photo_file_by_photo_id. In a host that renders it, the grid shows them; the answer omits image links.search_photos_by_imageUse this when the user wants photographs that look like a picture, rather than ones described in words: a picture they link to, one the host passes to the tool as a file, or a Pexafy photo already found or liked in the grid. Call it for “find images like this”, “something similar to this photo”, “find a free alternative to this image”, “I need this but royalty-free”, “photos in this style”, “more like the second one”, whether or not they say “search by image”. Give exactly one reference: `photo_id` for a Pexafy photo from an earlier result or liked in the grid; `image_url` for a picture at a public URL, such as a link the user pasted; `image_file` when the host passes the user's uploaded image to the tool; `image_base64` for image bytes a client already holds. Sending two is refused. A picture that is only visible in the conversation — not linked, not passed to the tool — is not a reference this tool can receive; its scene can be searched in words with `search_photos`. Words are optional, in `english_search_sentence`: with a `photo_id`, the words that photograph was found under; with an image, only what the user wants changed or kept (“like this but at night”). It finds free stock photographs in Pexafy's index that visually match the reference. The reference image is sent to Pexafy only to run the search; it is not stored. Each result carries a `rank`, a `photo_id`, its licence, the credit line to display and an image link. In a host that renders it, the grid shows them; the answer omits image links.
Ready-to-paste client configs
Paste either block (or both) into your client config, e.g. claude_desktop_config.json or ~/.cursor/mcp.json. We only show a config when the install command is confirmed.
Pexafy
{
"mcpServers": {
"pexafy": {
"url": "https://pexafy.com/mcp/"
}
}
}
Opentk MCP
{
"mcpServers": {
"r-huijts-opentk-mcp": {
"command": "npx",
"args": [
"-y",
"@r-huijts/opentk-mcp"
]
}
}
}
Frequently asked questions
Pexafy is categorized under Search & Data Extraction and uses a remote HTTP/SSE transport. Opentk MCP belongs to Search & Data Extraction and uses a local stdio subprocess. Pick Pexafy for search & data extraction work and Opentk MCP for search & data extraction.
Copy the mcpServers block from the config section on this page into your client's config (for example claude_desktop_config.json or ~/.cursor/mcp.json), then fully restart the client.
Pexafy has no declared pricing — check the project's own site. Opentk MCP is listed as free. Auth: no auth required. If a server needs environment variables such as API keys, define them under the env key in your client's MCP config.
Yes. MCP clients support multiple servers: add pexafy and r-huijts-opentk-mcp as separate keys in the same mcpServers object, and your assistant will call tools from either one.
On AllMCPs, Pexafy has a quality signal of 56/100 (Good) with 0 views, 0 installs and 0 GitHub stars. Opentk MCP has 60/100 (Good) with 1 views, 0 installs and 23 GitHub stars.
