# VectorFast Render docs

> Documentation for VectorFast Render, the brand-asset rendering API for AI agents and code. Templates plus JSON parameters become PNG, JPEG, or WebP through MCP, REST, or signed URLs.

Canonical URL: https://vectorfast.ai/render/docs
Markdown URL: https://vectorfast.ai/render/docs.md
Last modified: 2026-10-30

**Short answer:** VectorFast Render turns an official template, JSON parameters, and your brand kit into a PNG, JPEG, or WebP image. Agents call it through a remote MCP server; code calls `POST /v1/renders` or embeds a signed `/i/{template}.{format}` URL. The same inputs always produce the same pixels, and repeat requests are served from cache.

<Callout title="Early access">
  VectorFast Render is in early access. Billing is not connected yet (`credits_charged` is always `0`), API keys are issued to waitlist members as access opens, and OAuth sign-in for agents is planned. [Join the waitlist](/render#waitlist).
</Callout>

## How it fits together [#how-it-fits-together]

| Piece       | What it is                                                                    | Read                                            |
| ----------- | ----------------------------------------------------------------------------- | ----------------------------------------------- |
| Templates   | Eight official JSX + Tailwind templates with typed parameters and fixed sizes | [Templates](/render/docs/templates)             |
| Brand kit   | Versioned colors, fonts, and logo every render uses                           | [Brand kits and logos](/render/docs/brand-kits) |
| REST API    | `https://vectorfast.ai/v1/*`, API key auth, OpenAPI 3.1                       | [REST API reference](/render/docs/rest-api)     |
| Signed URLs | `GET /i/{template}.{format}?…&sig=` for og:image and `<img>` tags             | [Signed URLs](/render/docs/signed-urls)         |
| MCP server  | `https://vectorfast.ai/mcp` for Claude, Cursor, and other MCP clients         | [MCP](/render/docs/mcp)                         |
| Cache       | Edge cache plus R2, keyed by template version, params, and brand kit version  | [Caching and versions](/render/docs/caching)    |

## Start here [#start-here]

1. [Quickstart](/render/docs/quickstart): create an API key, render once, reuse the signed URL.
2. [Authentication](/render/docs/authentication): key format, revocation, and rate limits.
3. [Errors](/render/docs/errors) and [Limits and quotas](/render/docs/limits) when something is rejected.

Every page in these docs has a Markdown version at the same URL plus `.md`, for example [`/render/docs/quickstart.md`](/render/docs/quickstart.md). The site-wide index for AI tools is [`/llms.txt`](/llms.txt).

## What it is not [#what-it-is-not]

VectorFast Render is not a visual editor, an AI image generator, or a video renderer. Output is deterministic: templates are code, and the only inputs are the parameters you send and the brand kit version you pin.