OpenFate Bazi MCP vs Saju MCP
A side-by-side look at the OpenFate Bazi MCP and Saju MCP MCP servers: transport, auth, tools, quality signals, and the config to install either one in Claude, Cursor, Windsurf or VS Code.
Verdict: choose OpenFate Bazi MCP for spirituality & esoterica work as a local process; choose Saju MCP for spirituality & esoterica as a local process. You can also run both side by side in one mcpServers block.
Which MCP server should you choose?
Choose OpenFate Bazi MCP when
- You need dedicated capabilities in the Spirituality & Esoterica domain.
- You prefer a local stdio subprocess transport.
- You want tools like
calculate_bazi_chart, detect_bazi_interactions, calculate_true_solar_time.
Choose Saju MCP when
- You need dedicated capabilities in the Spirituality & Esoterica domain.
- You prefer a local stdio subprocess transport.
- You have the keys it needs:
SAJU_API_KEY, SAJU_API_BASE. - You want tools like
saju_calculate, saju_interpret, saju_compatibility.
Feature & specification comparison
Rows where the two servers differ are marked.
| Spec | ||
|---|---|---|
| Category | Spirituality & Esoterica | Spirituality & Esoterica |
| Quality signal | 65/100 · Great | 55/100 · Good |
| Install command | Confirmed | Confirmed |
| Transport | Local subprocess (stdio) | Local subprocess (stdio) |
| Auth | Not declared | Not declared |
| Pricing | Not declared | Not declared |
| Required env vars | None listed | SAJU_API_KEYSAJU_API_BASE |
| Verified owner | Community listing | Community listing |
| GitHub stars | 159 | 0 |
| Directory activity | 1 views 0 installs 0 upvotes | 1 views 0 installs 0 upvotes |
| Tools | 6 | 4 |
| Full listing | View OpenFate Bazi MCP | View Saju MCP |
Tools & capabilities
OpenFate Bazi MCP tools 6
calculate_bazi_chartCalculate a deterministic OpenFate Bazi/Four Pillars chart with True Solar Time correction, Day Master, DAYUN_SECOND_V2 onset receipts, Da Yun cycles, and branch interactions. Pass an exact birth time plus timezone or timezoneId for a calculated V2 onset; otherwise inspect the explicit unavailable/fallback receipt.detect_bazi_interactionsDetect raw Earthly Branch relationship occurrences for a natal chart and optional annual and Da Yun branches. Preserves every matching pillar position, including repeated branches. Covers clashes, six-combinations, the eight central-branch half-trines (COMBINATION_HALF), full trines, directionals, punishments, destructions, and harms. Results establish relationship presence, not weights, cancellation, or automatic transformation; targetElement is an affinity, not transformed energy.calculate_true_solar_timeCalculate OpenFate True Solar Time from civil birth time, longitude, timezone, and optional DST offset. Use this when explaining why the hour pillar may differ from ordinary clock-time tools.reverse_bazi_to_solar_timesFind possible Gregorian datetimes that produce a given four-pillar Bazi string. This is useful when a user only has a Bazi chart or screenshot. This lookup uses clock-time pillars without location-based true solar correction.get_openfate_bazi_policyReturn OpenFate calculation policy and LLM guidance for Bazi chart calls.get_openfate_bazi_resourcesReturn canonical OpenFate URLs for charting, readings, compatibility, wealth, true solar time, and AI crawler metadata.
Saju MCP tools 4
saju_calculateCompute the Korean Four Pillars of Destiny (사주팔자 / Bazi) from a solar birthdate. Returns the year/month/day/hour pillars (heavenly stem + earthly branch, with hanja), the five-element distribution (wood/fire/earth/metal/water), the Day Master, and the zodiac animal.saju_interpretFull Saju interpretation from a solar birthdate: the Four Pillars plus Ten Gods (십신), hidden stems, life stages, interactions, Yongshin (용신 / useful god), Daeun (대운 / luck pillars), and human-readable summaries in the requested language.saju_compatibilityScore two-person compatibility (궁합) from 0–100 based on both people's Saju. Returns the overall score and a breakdown (element balance, Day Master relation, branch harmony, branch clash) plus each person's Day Master and zodiac.saju_dailyDaily fortune snapshot (0–100 score + advice) for a given Day Master and date. Provide the Day Master either as a Korean stem character (갑, 을, 병, 정, 무, 기, 경, 신, 임, 계) or an English alias (e.g. wood_yang, water_yin). The Day Master comes from a prior saju_calculate / saju_interpret call (day_master.stem).
Ready-to-paste client configs
Paste either block (or both) into your client config, e.g. claude_desktop_config.json or ~/.cursor/mcp.json. We only show a config when the install command is confirmed.
OpenFate Bazi MCP
{
"mcpServers": {
"openfate-bazi-mcp": {
"command": "npx",
"args": [
"-y",
"@openfate/bazi-mcp"
]
}
}
}
Saju MCP
{
"mcpServers": {
"saju-mcp": {
"command": "npx",
"args": [
"-y",
"saju-mcp"
],
"env": {
"SAJU_API_KEY": "YOUR_SAJU_API_KEY_HERE",
"SAJU_API_BASE": "YOUR_SAJU_API_BASE_HERE"
}
}
}
}
Frequently asked questions
OpenFate Bazi MCP is categorized under Spirituality & Esoterica and uses a local stdio subprocess. Saju MCP belongs to Spirituality & Esoterica and uses a local stdio subprocess. Pick OpenFate Bazi MCP for spirituality & esoterica work and Saju MCP for spirituality & esoterica.
Copy the mcpServers block from the config section on this page into your client's config (for example claude_desktop_config.json or ~/.cursor/mcp.json), then fully restart the client.
OpenFate Bazi MCP has no declared pricing — check the project's own site. Saju MCP has no declared pricing — check the project's own site. If a server needs environment variables such as API keys, define them under the env key in your client's MCP config.
Yes. MCP clients support multiple servers: add openfate-bazi-mcp and saju-mcp as separate keys in the same mcpServers object, and your assistant will call tools from either one.
On AllMCPs, OpenFate Bazi MCP has a quality signal of 65/100 (Great) with 1 views, 0 installs and 159 GitHub stars. Saju MCP has 55/100 (Good) with 1 views, 0 installs and 0 GitHub stars.