io.github.j7an/nexus-mcp
PYPI · NEXUS-MCP · SCANNED SEP 20
Invoke CLI agents (Codex, Claude, OpenCode) as MCP tools with parallel execution
Available components
How this component scores in each security and reliability category. Every signal is checked automatically from public evidence about the published package, including repeated runs of it in an isolated sandbox, and we only credit what we can confirm. How we score → Why this is hard to score →
Supply Chain Security50
- Malware scan not yet available for this package.Unverified
- No known CVEs affecting this package version or its production dependencies.Pass
- Runs hatchling.build at install time, a recognised native-build step with no shell scripting around it. View diagnostics → Pass
- 1 of 24 dependencies flagged as unhealthy. View diagnostics → Partial
Provenance & Transparency32
- Source repository is publicly reachable at the declared URL. View diagnostics → Pass
- Provenance check failed: no build-provenance attestation is published. See how to fix → View diagnostics → Fail
- License check failed: the license (MIT License) isn't a recognized OSI-approved license. See how to fix → Fail
- Actively maintained (last published 0 days ago).Pass
- Disclosure check failed: no security disclosure policy was found in the source repository. See how to fix → Fail
Schema Quality & AI Usability77
- 100% of prompts and resources have a non-trivial description (not blank, and not just the item's name).Pass
- AI-judged instruction clarity (good).Pass
- Tool/resource definitions use about 2437 tokens (~76/item across 32 items; 20 tools + 12 resources), lean.Pass
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management90
- Stability observed for 27 of 30 days with no destabilising changes; credit accrues until the full window elapses.Partial
Tool Coverage83
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 41% 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
- All 2 tool(s) whose name or description implies an irreversible operation declare an MCP destructiveHint annotation.Pass
- An AI judge read all 22 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities100
- Implements a current MCP spec version (2026-07-28).Pass
How do I install the io.github.j7an/nexus-mcp server?
io.github.j7an/nexus-mcp runs locally as a PyPI package, launched with uvx nexus-mcp. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.
pypi · nexus-mcp
claude mcp add j7an-nexus-mcp -- uvx nexus-mcp
{
"mcpServers": {
"j7an-nexus-mcp": {
"command": "uvx",
"args": [
"nexus-mcp"
]
}
}
} {
"servers": {
"j7an-nexus-mcp": {
"command": "uvx",
"args": [
"nexus-mcp"
]
}
}
} codex mcp add j7an-nexus-mcp -- uvx nexus-mcp
{
"$schema": "https://opencode.ai/config.json",
"mcp": {
"j7an-nexus-mcp": {
"type": "local",
"command": [
"uvx",
"nexus-mcp"
],
"enabled": true
}
}
} openclaw mcp add j7an-nexus-mcp --command uvx --arg nexus-mcp
mcp_servers:
j7an-nexus-mcp:
command: "uvx"
args: ["nexus-mcp"] {
"McpServers": {
"j7an-nexus-mcp": {
"Transport": "stdio",
"Command": "uvx",
"Arguments": [
"nexus-mcp"
]
}
}
} assistant mcp add j7an-nexus-mcp -t stdio -c uvx -a nexus-mcp
{
"mcpServers": {
"j7an-nexus-mcp": {
"command": "uvx",
"args": [
"nexus-mcp"
]
}
}
} 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.
- 20 Sept 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 87 to 90. That category is still filling its 30-day observation window: 26 days of observed history at the previous scan, 27 at this one. The score rises as the window fills, whether or not the server changes.
- 19 Sept 26 −1
- Tool coverage: 69% → 41% ▼ functional
- Schema quality: fail → pass ▲ functional
- MCP protocol: Implements a current MCP spec version (2026-07-28). functional
- Package version: 1.0.3 → 1.1.0 functional
- 18 Sept 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 80 to 83. That category is still filling its 30-day observation window: 24 days of observed history at the previous scan, 25 at this one. The score rises as the window fills, whether or not the server changes.
- 17 Sept 26 −3
- Stability: pass → 0.80 functional
- 16 Sept 26 0
- Stability: 0.97 → pass security
- 15 Sept 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 93 to 97. That category is still filling its 30-day observation window: 28 days of observed history at the previous scan, 29 at this one. The score rises as the window fills, whether or not the server changes.
- 13 Sept 26 −14
- Malware scan: pass → unverified ▼ security
- 12 Sept 26 +15
- Malware scan: unverified → pass ▲ security
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 20 Sept 2026 · Analysed pypi/nexus-mcp@1.1.0
Provenance No attestation
The registry publishes no build provenance for this version, so there is nothing to verify.
| Result | No attestation |
|---|---|
| Ecosystem | pypi |
Background: How many MCP packages publish verified provenance →
Install scripts 1 script
| Hook | Tier | Command |
|---|---|---|
| build_backend | allowlisted | hatchling.build |
Background: Why install scripts are a supply-chain risk →
Dependencies 24 packages
| Packages resolved | 24 |
|---|---|
| Stale | 1 |
| Tree resolution | Complete |
Background: SBOMs and build attestations, explained →
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 →
agent_backends List Agent Backends ~33
Return deterministic descriptors with fresh availability for a workspace.
| Name | Type | Req | Description |
|---|---|---|---|
| workspace | object | yes | Reference to exactly one durable workspace identity. |
| Name | Type | Req | Description |
|---|---|---|---|
| items | array | – | – |
No examples provided.
agent_cancel Cancel Agent Job ~41
Request idempotent cancellation of one authorized durable job.
| Name | Type | Req | Description |
|---|---|---|---|
| job_id | string | yes | – |
| workspace | object | yes | Reference to exactly one durable workspace identity. |
| Name | Type | Req | Description |
|---|---|---|---|
| cancel_requested | boolean | yes | – |
| completed_immediately | boolean | yes | – |
| event_committed | boolean | yes | – |
| job_id | string | yes | – |
| state | string | yes | – |
No examples provided.
agent_continue Continue Agent Session ~71
Queue a durable turn against an existing authorized session.
| Name | Type | Req | Description |
|---|---|---|---|
| config | – | – | – |
| context | – | – | – |
| file_refs | – | – | – |
| idempotency_key | – | – | – |
| prompt | string | yes | – |
| session_id | string | yes | – |
| workspace | object | yes | Reference to exactly one durable workspace identity. |
| Name | Type | Req | Description |
|---|---|---|---|
| job_id | string | yes | – |
| operation | – | yes | – |
| session_id | – | – | – |
| state | string | – | – |
No examples provided.
agent_diagnose Diagnose Agent Backend ~54
Queue backend diagnostics without conditionally hiding the tool.
| Name | Type | Req | Description |
|---|---|---|---|
| backend | string | yes | – |
| config | – | – | – |
| idempotency_key | – | – | – |
| workspace | object | yes | Reference to exactly one durable workspace identity. |
| Name | Type | Req | Description |
|---|---|---|---|
| job_id | string | yes | – |
| operation | – | yes | – |
| session_id | – | – | – |
| state | string | – | – |
No examples provided.
agent_fork Fork Agent Session ~72
Fork an existing session when its backend advertises that capability.
| Name | Type | Req | Description |
|---|---|---|---|
| config | – | – | – |
| context | – | – | – |
| file_refs | – | – | – |
| idempotency_key | – | – | – |
| prompt | – | – | – |
| session_id | string | yes | – |
| workspace | object | yes | Reference to exactly one durable workspace identity. |
| Name | Type | Req | Description |
|---|---|---|---|
| job_id | string | yes | – |
| operation | – | yes | – |
| session_id | – | – | – |
| state | string | – | – |
No examples provided.
agent_list List Agent Jobs ~51
List one authorized page of durable jobs for an explicit workspace.
| Name | Type | Req | Description |
|---|---|---|---|
| cursor | – | – | – |
| limit | integer | – | – |
| states | – | – | – |
| workspace | object | yes | Reference to exactly one durable workspace identity. |
| Name | Type | Req | Description |
|---|---|---|---|
| items | array | – | – |
| next_cursor | – | – | – |
No examples provided.
agent_respond Respond to Agent Input ~55
Resolve one pending typed provider interaction for a durable job.
| Name | Type | Req | Description |
|---|---|---|---|
| input_id | string | yes | – |
| job_id | string | yes | – |
| response | – | yes | – |
| workspace | object | yes | Reference to exactly one durable workspace identity. |
| Name | Type | Req | Description |
|---|---|---|---|
| input_id | string | yes | – |
| job_id | string | yes | – |
| replayed | boolean | – | – |
| status | string | – | – |
No examples provided.
agent_result Get Agent Job Result ~44
Return the pending, succeeded, failed, or cancelled durable result variant.
| Name | Type | Req | Description |
|---|---|---|---|
| job_id | string | yes | – |
| workspace | object | yes | Reference to exactly one durable workspace identity. |
| Name | Type | Req | Description |
|---|---|---|---|
| result | – | yes | – |
No examples provided.
agent_review Review With Agent ~97
Queue a typed review when the session backend supports its target and delivery.
| Name | Type | Req | Description |
|---|---|---|---|
| config | – | – | – |
| context | – | – | – |
| delivery | string | – | – |
| file_refs | – | – | – |
| idempotency_key | – | – | – |
| instructions | – | – | – |
| session_id | string | yes | – |
| target | object | yes | A bounded, provider-neutral target for a code review. |
| workspace | object | yes | Reference to exactly one durable workspace identity. |
| Name | Type | Req | Description |
|---|---|---|---|
| job_id | string | yes | – |
| operation | – | yes | – |
| session_id | – | – | – |
| state | string | – | – |
No examples provided.
agent_start Start Agent Job ~79
Start a durable session turn in an explicitly selected workspace.
| Name | Type | Req | Description |
|---|---|---|---|
| access_policy | string | – | – |
| backend | string | yes | – |
| config | – | – | – |
| context | – | – | – |
| file_refs | – | – | – |
| idempotency_key | – | – | – |
| prompt | string | yes | – |
| workspace | object | yes | Reference to exactly one durable workspace identity. |
| Name | Type | Req | Description |
|---|---|---|---|
| job_id | string | yes | – |
| operation | – | yes | – |
| session_id | – | – | – |
| state | string | – | – |
No examples provided.
agent_status Get Agent Job Status ~38
Return one authorized durable job status projection.
| Name | Type | Req | Description |
|---|---|---|---|
| job_id | string | yes | – |
| workspace | object | yes | Reference to exactly one durable workspace identity. |
| Name | Type | Req | Description |
|---|---|---|---|
| backend_id | string | yes | – |
| cancel_requested | boolean | – | – |
| completed_at | – | – | – |
| created_at | string | yes | – |
| job_id | string | yes | – |
| latest_event_sequence | integer | – | – |
| operation | – | yes | – |
| pending_inputs | array | – | – |
| phase | – | – | – |
| resolved_config | – | – | – |
| session_id | – | – | – |
| state | string | yes | – |
| updated_at | string | yes | – |
| workspace_id | string | yes | – |
No examples provided.
batch_prompt Batch Prompt CLI Agents ~132
Send multiple prompts to CLI runners in parallel (primary tool). Fans out tasks server-side with asyncio.gather and a semaphore, enabling true parallel runner execution within a single MCP call. Single-task usage is perfectly valid — use prompt for convenience when sending one task.
| Name | Type | Req | Description |
|---|---|---|---|
| elicit | – | – | – |
| max_concurrency | integer | – | Max parallel runner invocations for this call (default: 3). The process worker maximum is 8; one call whose effective demand exceeds 8 is rejected. |
| tasks | array | yes | List of AgentTask objects, each with cli, prompt, and optional fields. |
| Name | Type | Req | Description |
|---|---|---|---|
| failed | integer | yes | – |
| results | array | yes | – |
| succeeded | integer | yes | – |
| total | integer | yes | – |
No examples provided.
clear_preferences Clear Session Preferences ~25
Clear all persistent preferences, reverting to per-call defaults. Returns: Confirmation string.
Input schema present but exposes no named parameters.
| Name | Type | Req | Description |
|---|---|---|---|
| result | string | yes | – |
No examples provided.
opencode_investigate Opencode Investigate ~51
Search project files and return the matching results. Chains GET /find → GET /file/content for up to max_files results.
| Name | Type | Req | Description |
|---|---|---|---|
| max_files | integer | – | – |
| query | string | yes | – |
| Name | Type | Req | Description |
|---|---|---|---|
| result | string | yes | – |
No examples provided.
opencode_session_review Opencode Session Review ~60
Review a session's messages and file changes. Chains GET /session/{id} → GET /session/{id}/message → GET /session/{id}/diff → GET /session/{id}/todo.
| Name | Type | Req | Description |
|---|---|---|---|
| session_id | string | yes | – |
| Name | Type | Req | Description |
|---|---|---|---|
| result | string | yes | – |
No examples provided.
opencode_set_provider_auth OpenCode Configuration ~33
Set authentication credentials for a provider.
| Name | Type | Req | Description |
|---|---|---|---|
| credentials | object | yes | – |
| provider_id | string | yes | – |
| Name | Type | Req | Description |
|---|---|---|---|
| result | string | yes | – |
No examples provided.
opencode_update_config OpenCode Configuration ~23
Update OpenCode server configuration.
| Name | Type | Req | Description |
|---|---|---|---|
| config | object | yes | – |
| Name | Type | Req | Description |
|---|---|---|---|
| result | string | yes | – |
No examples provided.
prompt Prompt CLI Agent ~226
Send a prompt to a CLI runner as a background task. Returns immediately with a task ID. Client polls for results. This prevents timeouts for long operations (YOLO mode: 2-5 minutes).
| Name | Type | Req | Description |
|---|---|---|---|
| cli | – | – | CLI runner name (e.g., "codex"). None triggers interactive selection. |
| context | – | – | Optional context metadata |
| elicit | – | – | – |
| execution_mode | – | – | 'default' (safe) or 'yolo'. None inherits session preference. |
| max_retries | – | – | Max retry attempts for transient errors (None inherits session preference). |
| model | – | – | Model name. None triggers interactive selection or uses CLI default. |
| output_limit | – | – | Max output bytes (None inherits session preference or uses env default). |
| prompt | string | yes | Prompt text to send to the runner |
| retry_base_delay | – | – | Base delay seconds for exponential backoff (None inherits session/config). |
| retry_max_delay | – | – | Backoff ceiling in seconds (None inherits session preference or config). |
| timeout | – | – | Subprocess timeout seconds (None inherits session preference or uses env default). |
| Name | Type | Req | Description |
|---|---|---|---|
| result | string | yes | – |
No examples provided.
set_model_tiers Set Model Tiers ~58
Save model tier classifications. Client sends sampling/benchmark results; server persists to backing store. Overwrites any previously saved tiers entirely.
| Name | Type | Req | Description |
|---|---|---|---|
| tiers | object | yes | Mapping of model name to tier ('quick', 'standard', 'thorough'). |
| Name | Type | Req | Description |
|---|---|---|---|
| result | string | yes | – |
No examples provided.
set_preferences Set Session Preferences ~508
Set persistent preferences that apply to subsequent prompt/batch_prompt calls. Preferences persist across MCP sessions. Call again to update, or use clear_preferences to reset all fields at once. To clear a single field while keeping others, pass the corresponding clear_* flag: set_preferences(clear_model=True) # clears model, keeps execution_mode
| Name | Type | Req | Description |
|---|---|---|---|
| clear_confirm_high_retries | boolean | – | – |
| clear_confirm_large_batch | boolean | – | – |
| clear_confirm_vague_prompt | boolean | – | – |
| clear_confirm_yolo | boolean | – | – |
| clear_elicit | boolean | – | – |
| clear_execution_mode | boolean | – | If True, resets execution_mode to None regardless of the execution_mode argument. |
| clear_max_retries | boolean | – | If True, resets max_retries to None regardless of the argument. |
| clear_model | boolean | – | If True, resets model to None regardless of the model argument. |
| clear_output_limit | boolean | – | If True, resets output_limit to None regardless of the argument. |
| clear_retry_base_delay | boolean | – | If True, resets retry_base_delay to None. |
| clear_retry_max_delay | boolean | – | If True, resets retry_max_delay to None. |
| clear_timeout | boolean | – | If True, resets timeout to None regardless of the argument. |
| confirm_high_retries | – | – | – |
| confirm_large_batch | – | – | – |
| confirm_vague_prompt | – | – | – |
| confirm_yolo | – | – | – |
| elicit | – | – | – |
| execution_mode | – | – | Default execution mode ('default' or 'yolo'). None retains the current value (use clear_execution_mode=True to reset). |
| max_retries | – | – | Default max retry attempts for transient errors. None retains the current value (use clear_max_retries=True to reset). |
| model | – | – | Default model name (e.g. 'gpt-5.2'). None retains the current value (use clear_model=True to reset). |
| output_limit | – | – | Default max output bytes per response. None retains the current value (use clear_output_limit=True to reset). |
| retry_base_delay | – | – | Default base delay seconds for exponential backoff. None retains the current value (use clear_retry_base_delay=True to reset). |
| retry_max_delay | – | – | Default max delay cap seconds for exponential backoff. None retains the current value (use clear_retry_max_delay=True to reset). |
| timeout | – | – | Default subprocess timeout in seconds. None retains the current value (use clear_timeout=True to reset). |
| Name | Type | Req | Description |
|---|---|---|---|
| result | string | yes | – |
No examples provided.
What is the io.github.j7an/nexus-mcp server?
io.github.j7an/nexus-mcp is listed in the public MCP registry as io.github.j7an/nexus-mcp. Invoke CLI agents (Codex, Claude, OpenCode) as MCP tools with parallel execution. This page covers its PyPI package (nexus-mcp).
Is the io.github.j7an/nexus-mcp server safe to use?
io.github.j7an/nexus-mcp scores 65 out of 100 on VerifyMCP. We found no known CVEs affecting it as of 20 September 2026. 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 io.github.j7an/nexus-mcp server expose?
io.github.j7an/nexus-mcp exposes 20 tools: batch_prompt, prompt, set_preferences, clear_preferences, set_model_tiers, and 15 more. Their descriptions and schemas cost roughly 1,751 tokens of context every time the server is loaded.
Is the io.github.j7an/nexus-mcp server still maintained?
io.github.j7an/nexus-mcp is still listed as active in the MCP registry. We last reached this channel on 20 September 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.