Wenbu · 问卜
REMOTE · WENBU.APP
Free BaZi, I Ching, tarot, Zi Wei and bilingual learning tools with transparent methods. No API key.
Available components
Last scanned (10 hours ago)
Scores higher than 85% of remote servers
Reachable. Last reached 5 Nov 2026.
Category Education and Research
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. How we score → Why this is hard to score →
Endpoint Security74
- The endpoint's TLS certificate is valid, in date, and uses a strong key. View diagnostics → Pass
- No authorisation is required to call this server. Nothing on it is marked destructive, but we can't show that an anonymous caller can only read: full credit needs the server to list at least one tool and every tool to be verifiably read-only. We use a best-effort check of tool names and descriptions to tell read-only tools from tools that change things, so some genuinely read-only tools may not get full credit. Names that start with a read verb (get, list, read, search and similar) and accurate readOnlyHint annotations help. Meet that to earn full credit, or require authorisation. See how to fix → View diagnostics → Partial
- HTTPS is enforced; there's no plaintext access path. View diagnostics → Pass
- HSTS check failed: the Strict-Transport-Security header is absent. See how to fix → View diagnostics → Fail
- DNSSEC check failed: this domain isn't protected by DNSSEC. See how to fix → View diagnostics → Fail
Transport & Reachability100
- Verified streamable-http transport via a live MCP handshake. View diagnostics → Pass
Schema Quality & AI Usability68
- 80% of prompts and resources have a non-trivial description (not blank, and not just the item's name).Partial
- AI-judged instruction clarity (fair).Partial
- Tool/resource definitions use about 626 tokens (~62/item across 10 items; 7 tools + 3 resources), lean.Pass
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management100
- No destabilizing schema changes in the last 30 days.Pass
Tool Coverage73
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 4% of tool parameters carry a description.Partial
- Structured output schemas are declared (100% of tools); any adoption earns full credit.Pass
Tool Safety100
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- We read all 7 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
- An AI judge read all 9 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities100
- Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.Pass
Checks we ran (13)
- TLS certificate
- Authorization
- HTTPS
- HSTS header
- DNSSEC
- Transport
- Schema quality
- Stability
- Tool coverage
- Injection markers
- Destructive annotations
- Judged manipulation
- MCP protocol
Does not apply to this hosted endpoint (2)
- Supply Chain SecurityScored on package channels only. This is a hosted endpoint, so there is nothing to install or inspect.
- Provenance & TransparencyScored on package channels only. This is a hosted endpoint, so there is nothing to install or inspect.
The score does not measure everything. What the score does not measure →
Every change we have recorded for this component, newest first. Security-relevant changes are always shown. ▲ marks a change for the better, ▼ a change for the worse; unmarked changes are neutral.
- 2 Nov 26 +1
- Stability: 0.97 → pass security
- 31 Oct 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 90 to 93. That category is still filling its 30-day observation window: 27 days of observed history at the previous scan, 28 at this one. The score rises as the window fills, whether or not the server changes.
- 29 Oct 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 83 to 87. That category is still filling its 30-day observation window: 25 days of observed history at the previous scan, 26 at this one. The score rises as the window fills, whether or not the server changes.
- 27 Oct 26 +1
- Tool “read_library” rewrote its description, which is the text the model reads security
- 25 Oct 26 +3
- Schema quality: 497 → 603 ▼ functional
- Schema quality: 50% → 80% ▲ functional
- Tool “calculate_bazi” now declares an output schema ▲ functional
- Tool “calculate_ziwei” now declares an output schema ▲ functional
- Tool “cast_iching” now declares an output schema ▲ functional
- Tool “draw_tarot” now declares an output schema ▲ functional
- Tool “read_library” now declares an output schema ▲ functional
- Tool “search_library” now declares an output schema ▲ functional
- The server now declares the “prompts” capability functional
- First check of Tool coverage: 100 functional
- New prompt “reflect_on_reading” functional
- New prompt “research_with_sources” functional
- New resource “capabilities” functional
- Server version: 1.4.0 → 1.5.0 functional
- New tool “get_daily_card” functional
- “calculate_bazi” reworded the description of “timezone” cosmetic
- Tool “calculate_bazi” changed its title: calculate bazi cosmetic
- Tool “calculate_ziwei” changed its title: calculate ziwei cosmetic
- Tool “cast_iching” changed its title: cast iching cosmetic
- Tool “draw_tarot” changed its title: draw tarot cosmetic
- Tool “read_library” changed its title: read library cosmetic
- Tool “search_library” changed its title: search library cosmetic
- 23 Oct 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 63 to 67. That category is still filling its 30-day observation window: 19 days of observed history at the previous scan, 20 at this one. The score rises as the window fills, whether or not the server changes.
- 21 Oct 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 57 to 60. That category is still filling its 30-day observation window: 17 days of observed history at the previous scan, 18 at this one. The score rises as the window fills, whether or not the server changes.
- 19 Oct 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 50 to 53. That category is still filling its 30-day observation window: 15 days of observed history at the previous scan, 16 at this one. The score rises as the window fills, whether or not the server changes.
Diagnostic detail from the automated scan of this channel: what the scanner observed at each step, so you can see exactly where a check passed or failed. It is informational only and never changes the trust score.
Captured 5 Nov 2026 · Probed https://wenbu.app/mcp
TLS valid
Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .
| Subject | Issuer | Valid from | Valid until | Key | Signature | Serial |
|---|---|---|---|---|---|---|
| CN=wenbu.app | CN=WE1,O=Google Trust Services,C=US | 30 Sept 2026 | 29 Dec 2026 | ECDSA 256 | ECDSA-SHA256 | f56509ebd10d1608138af75edf7a23c2 |
| SANs: wenbu.app, www.wenbu.app, *.www.wenbu.app | ||||||
| CN=WE1,O=Google Trust Services,C=US (CA) | CN=GTS Root R4,O=Google Trust Services LLC,C=US | 13 Dec 2023 | 20 Feb 2029 | ECDSA 256 | ECDSA-SHA384 | 7ff31977972c224a76155d13b6d685e3 |
| CN=GTS Root R4,O=Google Trust Services LLC,C=US (CA) | CN=GlobalSign Root CA,OU=Root CA,O=GlobalSign nv-sa,C=BE | 15 Nov 2023 | 28 Jan 2028 | ECDSA 384 | SHA256-RSA | 7fe530bf331343bedd821610493d8a1b |
Background: What to check on a remote MCP endpoint →
DNSSEC insecure
Validation of wenbu.app. — Not signed
| Zone | DS | Keys | Algorithms | Outcome |
|---|---|---|---|---|
| . | Trust anchor | 20326, 38696 | 8, 8 | Verified |
| app. | DS published | 23684 | 8 | Verified |
| wenbu.app. | No DS | Unsigned (proven) parent-signed NSEC/NSEC3 proves an unsigned delegation |
Authentication No authorisation required
The endpoint answered without asking for a token. Anyone who knows the URL can reach it.
| Result | No authorisation required |
|---|---|
| HTTP status | 200 |
| Header | Value |
|---|---|
| content-security-policy | default-src 'none'; frame-ancestors 'none' |
| x-content-type-options | nosniff |
| referrer-policy | no-referrer |
Background: How OAuth 2.1 works in the 2026 MCP spec →
Transports 2 probes
| Transport | URL | Outcome | Status | Location |
|---|---|---|---|---|
| streamable-http | https://wenbu.app/mcp | Verified | 200 | |
| http (plaintext) | http://wenbu.app/mcp | HTTPS enforced | 301 | https://wenbu.app/mcp |
The tools this component advertises to a client, with an estimated token cost for each. Expand a tool to see its parameters and schema. The per-tool counts are indicative and are not scored directly; the schema's total context footprint is one signal in Schema Quality & AI Usability. A tool's description is untrusted text the model reads on every call, which is what makes this list a security surface and not just an inventory: how tool poisoning works →
calculate_bazi calculate bazi ~102
Calculate four pillars. Unknown time returns no hour pillar. Gregorian date, IANA timezone, explicit day boundary. No prediction.
| Name | Type | Req | Description |
|---|---|---|---|
| date | string | yes | – |
| dayBoundary | string | – | – |
| locale | string | – | – |
| longitude | number | – | – |
| solarTime | boolean | – | – |
| time | – | – | – |
| timezone | string | – | Birthplace IANA zone or explicit offset. If omitted, Asia/Shanghai is assumed and disclosed. |
| Name | Type | Req | Description |
|---|---|---|---|
| calendar | object | yes | – |
| dayMaster | object | yes | – |
| elements | array | yes | – |
| input | object | yes | – |
| kind | string | yes | – |
| method | object | yes | – |
| pillars | array | yes | – |
| version | string | yes | – |
| warnings | array | yes | – |
No examples provided.
calculate_ziwei calculate ziwei ~73
Calculate Zi Wei Dou Shu twelve palaces from an entered local civil date and known time. iztro default school, no solar-time correction. Sex is a traditional calculation parameter.
| Name | Type | Req | Description |
|---|---|---|---|
| date | string | yes | – |
| locale | string | – | – |
| sex | string | yes | – |
| time | string | yes | – |
| Name | Type | Req | Description |
|---|---|---|---|
| body | string | yes | – |
| fiveElementsClass | string | yes | – |
| input | object | yes | – |
| kind | string | yes | – |
| lunarDate | string | yes | – |
| method | object | yes | – |
| palaces | array | yes | – |
| soul | string | yes | – |
| time | string | yes | – |
| version | string | yes | – |
No examples provided.
cast_iching cast iching ~61
Cast six three-coin lines or supply your own. Lines are ordered bottom to top, values 6/7/8/9. Returns original and changed King Wen hexagrams.
| Name | Type | Req | Description |
|---|---|---|---|
| lines | array | – | – |
| locale | string | – | – |
| Name | Type | Req | Description |
|---|---|---|---|
| changed | object | yes | – |
| kind | string | yes | – |
| lines | array | yes | – |
| method | object | yes | – |
| moving | array | yes | – |
| original | object | yes | – |
| version | string | yes | – |
No examples provided.
draw_tarot draw tarot ~54
Draw one or three cards from a full 78-card deck without replacement. Reversals optional. Symbolic reflection only.
| Name | Type | Req | Description |
|---|---|---|---|
| count | – | – | – |
| locale | string | – | – |
| reversals | boolean | – | – |
| Name | Type | Req | Description |
|---|---|---|---|
| cards | array | yes | – |
| kind | string | yes | – |
| method | object | yes | – |
| version | string | yes | – |
No examples provided.
get_daily_card get daily card ~69
Get a public daily reflection card and practice using the server calendar in an IANA timezone. No model, account, personal history or quota turn. Can differ from a personal browser/account card. Keep the returned result for follow-up.
| Name | Type | Req | Description |
|---|---|---|---|
| locale | string | – | – |
| timezone | string | – | – |
| Name | Type | Req | Description |
|---|---|---|---|
| clock | object | yes | – |
| note | string | yes | – |
| practice | object | yes | – |
| result | object | yes | – |
| scope | string | yes | – |
No examples provided.
read_library read library ~112
Read a complete Wenbu guide or symbol by search_library ID. Handbook guides return Markdown, outline and export links without truncation. Optionally provide a section ID from the outline; the returned scope makes partial reads explicit. A corrected stale citation returns source_superseded with a current-document read action, not withdrawn content or read evidence. External reference entries are metadata only; use your host browsing capability to verify them.
| Name | Type | Req | Description |
|---|---|---|---|
| id | string | yes | – |
| locale | string | – | – |
| section | string | – | – |
| Name | Type | Req | Description |
|---|---|---|---|
| content | string | yes | – |
| documentId | string | yes | – |
| format | string | yes | – |
| links | object | – | – |
| outline | array | – | – |
| scope | string | yes | – |
| section | string|null | yes | – |
| source | object | yes | – |
| truncated | boolean | yes | – |
No examples provided.
search_library search library ~62
Search Wenbu original guides, symbols and curated reference metadata. This is a bounded catalogue, not a web search. Search snippets do not mean the source was read.
| Name | Type | Req | Description |
|---|---|---|---|
| limit | integer | – | – |
| locale | string | – | – |
| query | string | yes | – |
| Name | Type | Req | Description |
|---|---|---|---|
| results | array | yes | – |
No examples provided.
How do I install the Wenbu · 问卜 MCP server?
Wenbu · 问卜 is a hosted endpoint at https://wenbu.app/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.
remote · wenbu.app
claude mcp add --transport http app-wenbu-mcp 'https://wenbu.app/mcp'
What is the Wenbu · 问卜 MCP server?
Wenbu · 问卜 is an MCP server listed in the public MCP registry as app.wenbu/mcp. Free BaZi, I Ching, tarot, Zi Wei and bilingual learning tools with transparent methods. No API key. This page covers its hosted endpoint (https://wenbu.app/mcp).
Is the Wenbu · 问卜 MCP server safe to use?
Wenbu · 问卜 scores 82 out of 100 on VerifyMCP. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.
What tools does the Wenbu · 问卜 MCP server expose?
Wenbu · 问卜 exposes 7 tools: calculate_bazi, cast_iching, draw_tarot, calculate_ziwei, search_library, and 2 more. Their descriptions and schemas cost roughly 533 tokens of context every time the server is loaded.
Does the Wenbu · 问卜 MCP server require authentication?
No. We connected to Wenbu · 问卜 without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.
Is the Wenbu · 问卜 MCP server still maintained?
Wenbu · 问卜 is still listed as active in the MCP registry. We last reached this channel on 5 November 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.
What did VerifyMCP test on the Wenbu · 问卜 MCP server?
VerifyMCP ran 13 checks on Wenbu · 问卜, covering TLS certificate, Authorization, HTTPS, HSTS header and 9 more. Supply Chain Security and Provenance & Transparency do not apply to a hosted endpoint, so they were not tested. The score does not measure everything, and the scoring documentation lists what it leaves out.