mindgraph

MindGraph diagrams from a topic plus diagram type (8 Thinking Maps, mind map, or concept map), or precise node text edits via PATCH.

MindGraph is an AI-assisted diagram platform. Use this skill with the configured base URL, account number (phone), and API token.

What the user usually provides

Typical request — two inputs:

1. Topic / subject — the central idea or short instruction (maps to API field prompt).
2. Diagram type — which chart they want (maps to diagram_type).

For POST /api/generate_graph, prompt is always required except special dimension-only modes. Add diagram_type when the user names one of the chart types above; if they only give a topic and not a type, you may omit diagram_type so MindGraph can auto-detect a suitable type from the text.

Advanced request — fix specific node text:

If the user wants exact labels on certain nodes (not a full regeneration), use GET /api/diagrams/{id} to read spec and node IDs, then PATCH /api/diagrams/{id}/nodes with structured updates (node_id, new_text). Re-fetch the PNG after edits (see §3).

Supported diagram_type values (MindGraph)

Eight Thinking Maps (use these strings in JSON):

diagram_type	Typical use
circle_map	Brainstorm & associate around a center
bubble_map	Describe attributes of a topic
double_bubble_map	Compare & contrast two topics
tree_map	Classify & group
brace_map	Whole & parts
flow_map	Sequence & steps
multi_flow_map	Cause & effect
bridge_map	Analogies

Also supported:

diagram_type	Notes
mind_map	Hierarchical mind map. Alias mindmap is normalized to mind_map.
concept_map	Concept maps (concepts + labeled links). Extra fields like concept_map_topic, concept_a, concept_b exist for focused modes — see OpenAPI / GenerateRequest when the user asks for relationship-only or similar.

Other diagram features are optional; use them only when the user’s wording clearly requires that mode:

• fixed_dimension — tree / brace / bridge maps (preserve a classification, decomposition, or analogy pattern)
• dimension_only_mode — tree / brace maps only (dimension known, topic generated)

Authentication (every request)

Set headers on all HTTP calls:

• Authorization: Bearer {MINDGRAPH_TOKEN} — token starts with mgat_
• X-MG-Account: {MINDGRAPH_ACCOUNT} — same phone number as the MindGraph account (no spaces); required with mgat_ (auth fails without a matching account)
• X-MG-Client: openclaw — recommended on every request for attribution (not required for auth). Missing → server treats client as unspecified. Matches Chrome extension chrome-extension; [TokenAudit] / client_source use this label
• X-Request-Id — optional; recommended on long calls (especially web-content PNG). Use a fresh UUID per request. On the web-content PNG path it appears in [TokenAudit] and LLM metadata (http_request_id); general mgat_ TokenAudit logs client/path only

Never print or log the token or account in assistant-visible output.

Use current env on every request. Substitute MINDGRAPH_BASE_URL, MINDGRAPH_ACCOUNT, and MINDGRAPH_TOKEN from the skill environment each time you build a URL or headers. Do not reuse token or account values from earlier messages if the user said they updated credentials—use the latest configured values.

Updating auth (works immediately on the server)

• MindGraph API checks the Bearer token and X-MG-Account on every request. There is no sync delay: after the user generates or regenerates a token in the app, that token is valid on the next HTTP call with matching headers. Regenerating revokes the previous token immediately.
• OpenClaw / WorkBuddy host may inject env only when the app starts or when the skill reloads. If the user changed MINDGRAPH_* in config but requests still behave like the old credentials, they should save the config and restart the client (or use the host’s reload/restart skill action if it has one). After the new env is loaded, requests use the new values immediately—no extra step on MindGraph’s side.

Setup

1. Log into MindGraph in the browser.
2. Open 账户信息 → API Token → 生成 Token.
3. Copy the token once; set MINDGRAPH_TOKEN and MINDGRAPH_ACCOUNT (phone) and MINDGRAPH_BASE_URL (default test deployment: https://test.mindspringedu.com; override for your own host) in OpenClaw skill env.
4. Tokens expire after 90 days; regenerate from the same UI.

1. Generate diagram spec

POST {MINDGRAPH_BASE_URL}/api/generate_graph

JSON body (minimal — topic + type):

json

{
  "prompt": "Photosynthesis",
  "diagram_type": "mind_map",
  "language": "en",
  "llm": "qwen"
}

• prompt — user’s topic or instruction (required except special dimension-only modes; see GenerateRequest in the app).
• diagram_type — one of the Thinking Maps, mind_map, or concept_map (see tables above). Optional for auto-detection.
• language / llm — match user preference and host defaults when relevant.

Response JSON includes success, spec (diagram JSON), diagram_type, and optional error. Prefer checking success before saving.

2. Save diagram

POST {MINDGRAPH_BASE_URL}/api/diagrams

json

{
  "title": "My diagram",
  "diagram_type": "mind_map",
  "spec": { }
}

Use the spec from step 1. Response includes id (diagram id string).

3. Push diagram image to the user

After create or any edit:

GET {MINDGRAPH_BASE_URL}/api/diagrams/{id}/png

Use the same auth headers as every other call (Authorization + X-MG-Account; mgat_ requires both). Omitting them returns 401 (JWT token required for this endpoint).

Response JSON:

• url — Signed, time-limited link to a PNG under /api/temp_images/. The path ends with .png (e.g. .../temp_images/diagram_<uuid>.png?sig=...&exp=...); the ?sig= / &exp= part is required for access, not optional decoration.
• filename — Suggested filename (always diagram_<hex>.png) for downloads or the image tool.

Pass url to the image tool so the user sees the current canvas. Fetching url does not send Bearer tokens (signature is in the query string). The GET /api/temp_images/... response includes Content-Disposition with a .png filename for browser downloads.

4. Read diagram (before edits)

GET {MINDGRAPH_BASE_URL}/api/diagrams/{id}

Use the returned spec and node IDs before patching.

5. Patch nodes (optional)

PATCH {MINDGRAPH_BASE_URL}/api/diagrams/{id}/nodes

Use this when the user has specific edits (wording on named nodes) rather than regenerating from a topic alone.

Either full replace:

json

{ "spec": { } }

Or structured updates (preferred for targeted label changes):

json

{ "action": "update", "updates": [{ "node_id": "branch_0", "new_text": "New label" }] }

Actions: update, add, delete (see API error messages for required fields). add appends a new child under the diagram root (server assigns the id); there is no parent-targeting field. Always GET the diagram first (§4) when node_id values are unknown. Then call step 3 again for a fresh image.

6. Inline recommendations

These routes live without the /api prefix (root of MINDGRAPH_BASE_URL):

• POST {MINDGRAPH_BASE_URL}/thinking_mode/inline_recommendations/start
• POST {MINDGRAPH_BASE_URL}/thinking_mode/inline_recommendations/next_batch
• POST {MINDGRAPH_BASE_URL}/thinking_mode/inline_recommendations/cleanup

Response type: start and next_batch return text/event-stream (SSE), not a single JSON body. The stream emits data: {...} lines. Parse JSON after each data: prefix; handle events such as recommendation_generated (includes recommendation text) and error.

Request bodies must match the server schema (e.g. session_id, diagram_type, stage, node_id, nodes, language, count — see the app’s OpenAPI or InlineRecommendationsStartRequest / InlineRecommendationsNextRequest).

Workflow: start (SSE) → optional next_batch (SSE) for more items → cleanup (JSON) with node_ids. Present suggestions to the user; apply the chosen item via PATCH (step 5) and push image (step 3).

If the HTTP client cannot read SSE, inline recommendations may not be usable from that environment — prefer the browser UI for that flow.

7. Web page → mind map PNG (API / Chrome extension)

Mind map only from extracted page text (same auth headers as above).

JSON spec only

POST {MINDGRAPH_BASE_URL}/api/generate_from_web_content

json

{
  "page_content": "plain or markdown text",
  "content_format": "text/plain",
  "page_title": "Optional title",
  "page_url": "https://...",
  "language": "zh"
}

content_format is text/plain or text/markdown. page_content max length 32000 characters. Returns JSON with the generated spec (LLM only; faster than the PNG route).

Single-step PNG download

POST {MINDGRAPH_BASE_URL}/api/web_content_mindmap_png

Same JSON body as above, plus optional width and height (viewport size for PNG capture; defaults 1200×800 if omitted). Response: image/png body (not JSON). Default Content-Disposition filename is mindgraph-web-content.png; when the server also saves the diagram, it may send X-MG-Diagram-Id and rename the file to mindgraph-{diagram_id}.png. On error, the server may return JSON with detail (HTTP 4xx/5xx). Do not call response.json() on success—read bytes.

Both web-content routes require the account’s chrome_extension school-tier feature (same gate family as API tokens). Trial / lite orgs that lack that feature get 403.

Timeouts (critical for OpenClaw / any HTTP client)
The PNG path runs LLM generation plus Playwright screenshot of the export page. End-to-end latency often exceeds 60 seconds. Use a client read timeout of at least 180 seconds (3 minutes) on this request (the Chrome extension uses the same). Shorter timeouts produce misleading “network” failures. The JSON-only route (generate_from_web_content) is also LLM-bound; allow several minutes if your stack defaults to 30–60s.

Chrome extension (same API)
The repo ships chrome-extension/ (Load unpacked in chrome://extensions). It captures the active tab via a short message to the service worker, then runs fetch + download in the popup so the MV3 worker is not held across a long request. Base URL in settings must be the API origin (e.g. https://your-host.example.com), same as MINDGRAPH_BASE_URL here—not the SPA path /mindgraph alone.

8. Also useful (optional shortcuts)

Same auth headers as above. Use when the default generate → save → PNG flow is heavier than needed:

Method	Path	When
GET	/api/diagrams	List the user’s diagrams (paginated) before editing an existing one
POST	/api/generate_png	Prompt → PNG bytes in one call (skip explicit save)
POST	/api/export_png	Existing spec → PNG bytes
POST	/api/generate_dingtalk	Prompt → markdown-friendly image URL (DingTalk / similar bots)

Rate limits apply (e.g. diagram PNG URL around 20/min; many generate routes around 100/min). On 429, back off and retry.

Best practices

• Always send Authorization + X-MG-Account on every mgat_ call, using current MINDGRAPH_* env values (see Authentication and Updating auth above).
• Prefer X-MG-Client: openclaw on every call; add X-Request-Id especially on long web-content PNG calls.
• Default flow: map the user’s topic → prompt and their chart choice → diagram_type from the eight Thinking Maps plus mind_map / concept_map as needed.
• Use long HTTP timeouts for web_content_mindmap_png and other heavy routes (see §7).
• After any mutation, fetch the PNG URL (step 3) before replying.
• Prefer reading the diagram (step 4) before PATCH when IDs are unknown.
• Warn the user before token expiry when relevant (tokens last 90 days).
• If auth fails after the user updated env in WorkBuddy/OpenClaw, suggest saving config and restarting the host app so new variables are picked up; then retry.
• On 403 for web-content or token minting, the school tier may lack api_token / chrome_extension (trial / lite).