# Equation.io (remote · equation.io) Create interactive 2D and 3D graphs with validated equations, shareable links, and PNG previews. - Trust score: 71/100 (medium) - Change this week: 0 - Registry status: active - Liveness: live - Owner verified: no - Last scored: 2026-09-27 ## Components - remote · `equation.io`: 71/100 (this document), [markdown](https://verifymcp.io/servers/io-equation-equation/equation.md), [page](https://verifymcp.io/servers/io-equation-equation/equation) ## Channel facts - Endpoint: `https://equation.io/mcp` - Transports: `streamable-http` - Auth: `none` - Version: `1.0.0` ## Trust breakdown How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. Scores are 0–100 per category. Scoring method: https://verifymcp.io/docs/scoring (what has changed: https://verifymcp.io/docs/scoring/changelog) Scored 2026-09-27. - **Endpoint Security**: 83/100 - The endpoint's TLS certificate is valid, in date, and uses a strong key. - No authorisation is required to call this server. Every tool declares its destructiveHint and none is destructive, so open access doesn't expose one. - HTTPS is enforced; there's no plaintext access path. - The HSTS (Strict-Transport-Security) header is present. - DNSSEC is configured correctly; the domain's records validate against the full chain to the root. - **Transport & Reachability**: 100/100 - Verified streamable-http transport via a live MCP handshake. - **Schema Quality & AI Usability**: 63/100 - 50% of prompts and resources have a non-trivial description (not blank, and not just the item's name). - AI-judged instruction clarity (excellent). - Context-footprint check failed: tool/resource definitions use about 938 tokens (~187/item across 5 items; 3 tools + 2 resources), over budget; trim descriptions and params. - Usage-examples check failed: none of the tools include examples. - **Stability & Change Management**: 0/100 - Stability check failed: schema churn in the 13 days we've observed: 2 tool removals, 0 breaking changes, 0 auth/transport breaks, 3 additions. - **Tool Coverage**: 100/100 - 100% of tools have a non-trivial description (not blank, and not just the tool's name). - 100% of tool parameters carry a description. - Structured output schemas are declared (100% of tools); any adoption earns full credit. - **Tool Safety**: 100/100 - No prompt-injection markers were found in the server instructions, tool names or descriptions we captured. - We read all 3 captured tool definition(s), and no name or description among them implies an irreversible operation. - An AI judge read all 5 captured unit(s) of tool text and found none that tries to manipulate the model reading it. - **Capabilities**: 73/100 - Spec-recency check failed: implements MCP spec 2025-06-18; the latest is 2026-07-28. - Supports UI / widget rendering. ## Install ### How do I install the Equation.io MCP server? Equation.io is a hosted endpoint at https://equation.io/mcp, so there is nothing to install locally. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation. ### Claude ```bash claude mcp add --transport http io-equation-equation 'https://equation.io/mcp' ``` ### Cursor ```json { "mcpServers": { "io-equation-equation": { "url": "https://equation.io/mcp" } } } ``` ### VS Code ```json { "servers": { "io-equation-equation": { "type": "http", "url": "https://equation.io/mcp" } } } ``` ### Codex ```toml [mcp_servers.io-equation-equation] url = "https://equation.io/mcp" ``` ### opencode ```json { "$schema": "https://opencode.ai/config.json", "mcp": { "io-equation-equation": { "type": "remote", "url": "https://equation.io/mcp", "enabled": true } } } ``` ### OpenClaw ```bash openclaw mcp add io-equation-equation --url 'https://equation.io/mcp' --transport streamable-http ``` ### Hermes ```yaml mcp_servers: io-equation-equation: url: "https://equation.io/mcp" ``` ### Netclaw ```json { "McpServers": { "io-equation-equation": { "Transport": "http", "Url": "https://equation.io/mcp" } } } ``` ### Vellum ```bash assistant mcp add io-equation-equation -t streamable-http -u 'https://equation.io/mcp' ``` ### Other ```json { "mcpServers": { "io-equation-equation": { "type": "http", "url": "https://equation.io/mcp" } } } ``` The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs. ## Changelog Every change recorded for this component, newest first. Days that predate change tracking, or that we cannot explain, say so: "we were watching and nothing happened" and "we were not watching" are different claims. ### 2026-09-27 (score 71, 0) - [security] Tool “encode_graph_url” rewrote its description, which is the text the model reads ### 2026-09-25 (score 71, 0) - [functional] We updated how we score, so this day's move reflects our rubric, not a change to the server ### 2026-09-24 (score 71, 0) - [security] Tool “encode_graph_url” rewrote its description, which is the text the model reads ### 2026-09-21 (score 71, 0) - [security] Tool “show_graph” rewrote its description, which is the text the model reads ### 2026-09-20 (score 71, −1) - [security] Resource “graph” now points somewhere else: ui://equation/graph-v1.html → ui://equation/graph-v2.html - [security] Tool “decode_graph_url” rewrote its description, which is the text the model reads - [security] Tool “encode_graph_url” rewrote its description, which is the text the model reads - [security] Tool “show_graph” rewrote its description, which is the text the model reads ### 2026-09-15 (score 72, +5) - [security regression] Stability: unverified → fail - [security regression] A breaking change shipped without a version bump: still 1.0.0 - [security regression] Tool “create_graph” was removed - [security regression] Tool “read_graph” was removed - [security improvement] Authorization: unverified → partial - [security] The server rewrote its instructions, which are the text every model session reads - [functional regression] Schema quality: 100% → 50% - [functional improvement] Schema quality: 230 → 172 - [functional] First check of Capabilities: pass - [functional] First check of Tool coverage: 100 - [functional] New resource “graph” - [functional] New tool “decode_graph_url” - [functional] New tool “encode_graph_url” - [functional] New tool “show_graph” ### 2026-09-14 (score 67) First indexed and scored. ## MCP tools (3) ### `encode_graph_url` (~482 tokens) Create a graph link Build an equation.io graph link, validating every row with the app's parser. Pass the COMPLETE graph in "equations": a flat array of strings, one equation or definition per string, in display order — when editing an existing graph (see decode_graph_url), include unchanged rows too. Rows can be: equations and inequalities in x,y (curves, regions; z makes it 3D), bare expressions in x, y (scalar fields — a curve is written y = f(x); complex plots via w), points (rows report "draggable"), parametric tuples in u,v — and definitions: "a = 2" (a draggable slider), "f(x) = x^3 - a x", coordinate fields like "r = sqrt(x^2+y^2)" for polar. t animates. Also derivatives d/dx, integrals int[a..b] f dx, sums sum[n=1..N], domain()/conformal()/iter() for complex plots, rgb()/hsl()/oklch() color fields, y' = … slope fields, random variables "X ~ Normal(m, s)"/"P(0