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Siyuan — Query and edit a SiYuan knowledge base via its API

Siyuan — Query and edit a SiYuan knowledge base via its API

Developer11 minutes3 questions2026-08-09
The idea in one minute

Start with meaning, then move to detail.

This lesson explains Siyuan — Query and edit a SiYuan knowledge base via its API as part of Hermes internals and extension points. You will learn what it does, when it matters, and the smallest safe test that proves it works.

If you are new

If you are new, do not memorize names. Focus on three questions: what problem does this solve, what access does it need, and how can you verify the result?

For hands-on use

For practice, inspect the first example, identify its effects, run it on test data, and compare the result with the source claim.

For specialists

For advanced readers, inspect Skill metadata, Reference: full SKILL.md, Prerequisites, then verify failure modes and version compatibility.

What do you need first?

Know Python, Git, and basic project structure before changing code.

What will you know?

A clear outcome before you read.

  • Understand Siyuan — Query and edit a SiYuan knowledge base via its API without assumed prior knowledge.
  • Separate the source description from what still needs testing in your environment.
  • Read the first command and identify its inputs and outputs before copying it.
Lesson terms

Short definitions before the details.

Skill
An instruction bundle that teaches Hermes a repeatable workflow without necessarily adding an external service.
Official page description

Query and edit a SiYuan knowledge base via its API

Topic map

What does the source say, and in what order?

  1. 01
    Skill metadata

    Start here to understand the core idea or structure.

  2. 02
    Reference: full SKILL.md

    Read this after the foundation, then connect it to the previous step.

  3. 03
    Prerequisites

    Read this after the foundation, then connect it to the previous step.

  4. 04
    API Basics

    Read this after the foundation, then connect it to the previous step.

  5. 05
    Quick Reference

    Read this after the foundation, then connect it to the previous step.

  6. 06
    Common Operations

    Read this after the foundation, then connect it to the previous step.

  7. 07
    Search (Full-Text)

    Read this after the foundation, then connect it to the previous step.

  8. 08
    Search (SQL)

    Read this after the foundation, then connect it to the previous step.

  9. 09
    Read Block Content

    Read this after the foundation, then connect it to the previous step.

  10. 10
    Read Child Blocks

    Finish here to verify the result and special cases.

Examples from the official page

Copy only after you understand the effect.

SIYUAN_TOKEN=your_token_here SIYUAN_URL=http://127.0.0.1:6806
curl -s -X POST "${SIYUAN_URL:-http://127.0.0.1:6806}/api/..." \ -H "Authorization: Token $SIYUAN_TOKEN" \ -H "Content-Type: application/json" \ -d '{"param": "value"}'
{"code": 0, "msg": "", "data": { ... }}
Try it now

Read the first command and identify its inputs and outputs before copying it.

Match every command to your installed Hermes version, review the files and accounts it can reach, and use non-sensitive data for the first test. If this explanation differs from the source, the official source wins.

Knowledge check

Three decisions before completion.

1. What is the source of truth when “Siyuan — Query and edit a SiYuan knowledge base via its API” changes?
2. What is the best way to apply this lesson?
3. What should happen before a step can modify files or an external account?