# gethologram.ai/docs The written documentation, in reading order. Every page has a Markdown twin at the address below: the same words, with no navigation, no markup and no scripts. ## Start GET /docs/index.md Overview. What Hologram Hub is, what it replaces, and the one command that proves it. GET /docs/quickstart.md Quickstart. Find a model, download one file, and prove the bytes, in three requests and no key. ## Concepts GET /docs/verification.md Verification. The one rule that makes a download from anywhere safe, and the three ways to apply it. GET /docs/addresses.md Names, revisions and addresses. What a model id means on the hub, why main does not move, and how an address pins a version forever. GET /docs/sources.md Sources and failover. Where the bytes come from, how the hub picks a source, and how you pin one. GET /docs/spaces.md Apps. Apps that run entirely in your browser, each in its own sealed frame, with every model byte verified before it is used. ## Connect GET /docs/huggingface.md Hugging Face tools. Point the tools you already have at the hub with one environment variable. GET /docs/ollama.md Ollama. Pull any GGUF in the index straight into Ollama, verified by Ollama itself. GET /docs/oci.md OCI artifacts. Pull a whole model as a CNCF ModelPack artifact with oras, modctl, skopeo or crane, every file verified by its digest. GET /docs/mcp.md MCP. Give a coding agent the hub as three tools, over one URL, with no key. GET /docs/objects.md Objects. The raw, content-addressed index under every dialect, and how to read, mirror or publish to it. ## Reference GET /docs/api.md API reference. Every route the hub answers, grouped by what it is for, generated from the OpenAPI document. GET /docs/errors.md Errors. Every status the hub answers, the shape it comes in, and what to do about it. GET /docs/limits.md Limits and scope. What the hub does not do, how big things can be, and where the edges are. If you would rather have it in one request, `/llms.txt` is this same list with the endpoints appended. ## The rule that makes it safe Hash what arrives. The expected hash comes from the index and never from the source that served the bytes, and this server does not verify on read. ## More https://gethologram.ai/agent.md the whole hub in one screen https://gethologram.ai/openapi.json every operation, OpenAPI 3.1, bindable directly https://gethologram.ai/mcp the same hub as MCP tools, no key