EPICS Channel Access
PYPI · LABMCP-EPICS · SCANNED SEP 30
MCP server for EPICS Channel Access: read, monitor and guarded writes of process variables.
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 Security49
- 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 build step with no custom scripting around it. View diagnostics → Pass
- 3 of 19 dependencies flagged as unhealthy. View diagnostics → Partial
Provenance & Transparency100
- Source repository is publicly reachable at the declared URL. View diagnostics → Pass
- Cryptographically verified build provenance (signed, bound to K-Dense-AI/lab-instrument-mcps). View diagnostics → Pass
- Clear OSI-approved license (Apache-2.0).Pass
- Actively maintained (last published 3 days ago).Pass
- Publishes a security disclosure policy (SECURITY.md).Pass
Schema Quality & AI Usability76
- AI-judged instruction clarity (excellent).Pass
- Context-footprint check failed: tool/resource definitions use about 1287 tokens (~128/item across 10 items; 10 tools + 0 resources), over budget; trim descriptions and params. See how to fix → Fail
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management13
- Stability observed for 4 of 30 days with no destabilising changes; credit accrues until the full window elapses.Partial
Tool Coverage98
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 94% 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 10 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
- An AI judge read all 11 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 EPICS Channel Access MCP server?
EPICS Channel Access runs locally as a PyPI package, launched with uvx labmcp-epics. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.
pypi · labmcp-epics
claude mcp add k-dense-ai-labmcp-epics -- uvx labmcp-epics
{
"mcpServers": {
"k-dense-ai-labmcp-epics": {
"command": "uvx",
"args": [
"labmcp-epics"
]
}
}
} {
"servers": {
"k-dense-ai-labmcp-epics": {
"command": "uvx",
"args": [
"labmcp-epics"
]
}
}
} codex mcp add k-dense-ai-labmcp-epics -- uvx labmcp-epics
{
"$schema": "https://opencode.ai/config.json",
"mcp": {
"k-dense-ai-labmcp-epics": {
"type": "local",
"command": [
"uvx",
"labmcp-epics"
],
"enabled": true
}
}
} openclaw mcp add k-dense-ai-labmcp-epics --command uvx --arg labmcp-epics
mcp_servers:
k-dense-ai-labmcp-epics:
command: "uvx"
args: ["labmcp-epics"] {
"McpServers": {
"k-dense-ai-labmcp-epics": {
"Transport": "stdio",
"Command": "uvx",
"Arguments": [
"labmcp-epics"
]
}
}
} assistant mcp add k-dense-ai-labmcp-epics -t stdio -c uvx -a labmcp-epics
{
"mcpServers": {
"k-dense-ai-labmcp-epics": {
"command": "uvx",
"args": [
"labmcp-epics"
]
}
}
} 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.
- 29 Sept 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 7 to 10. That category is still filling its 30-day observation window: 2 days of observed history at the previous scan, 3 at this one. The score rises as the window fills, whether or not the server changes.
- 28 Sept 26 +28
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 27 Sept 26 −32
- Tool safety: pass → unverified ▼ security
- Stability: Stability not yet verified: we do not have a sandbox capture of the MCP schema this version of the package serves yet. security
- Capabilities: pass → unverified ▼ functional
- Tool coverage: 100 → unverified ▼ functional
- First check of Schema quality: unverified functional
- Package version: 0.1.1 → 0.1.2 functional
- 26 Sept 26 71
First indexed and scored.
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 30 Sept 2026 · Analysed pypi/labmcp-epics@0.1.2
Provenance Verified
A signed build attestation was found and verified, binding this exact artifact to the source repository it claims to come from.
| Result | Verified |
|---|---|
| Ecosystem | pypi |
| Reason | Verified |
| Discovered via | Registry attestation endpoint |
| Source repo | K-Dense-AI/lab-instrument-mcps |
| Certificate issuer | https://token.actions.githubusercontent.com |
| Certificate SAN | https://github.com/K-Dense-AI/lab-instrument-mcps/.github/workflows/release.yml@refs/tags/labmcp-epics-v0.1.2 |
| Rekor log index | 2969518482 |
| Predicate type | PyPI publish attestation https://docs.pypi.org/attestations/publish/v1 |
| Subject digest | sha256:3991a38c7343fa19bfd4a2ec0c48b368e288c56e7630206fab296a6c257bbb20 |
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 19 packages
| Packages resolved | 19 |
|---|---|
| Stale | 2 |
| No linked repository | 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 →
apply_safe_state Apply Safe State ~68
Emergency action: write the scientist-configured safe-state PVs (--option safe_state, e.g. motor STOP fields, shutter close, HV off), all of them even if one fails. Available in read-only mode. It does not replace the facility's own interlocks and stop buttons.
Input schema present but exposes no named parameters.
| Name | Type | Req | Description |
|---|---|---|---|
| configured | boolean | yes | – |
| errors | array | yes | – |
| message | string | yes | – |
| results | array | yes | – |
| timestamp | string | yes | – |
No examples provided.
get_command_log Get Command Log ~46
Return the most recent raw commands sent to / replies received from the instrument (newest last). Useful for debugging and for recording what was done.
| Name | Type | Req | Description |
|---|---|---|---|
| limit | integer | – | – |
| Name | Type | Req | Description |
|---|---|---|---|
| result | array | yes | – |
No examples provided.
get_connection_info Get Connection Info ~40
Report which instrument is connected (identity, address, simulated or real), whether the server is read-only, and the active safety limits. Call this first.
Input schema present but exposes no named parameters.
Structured output declared, but exposes no named fields.
No examples provided.
get_pv Get Pv ~96
Read one PV with its metadata: value, units, precision, alarm severity/status, IOC timestamp and age, display/alarm/warning/control limits and enum state names. Waveforms come back downsampled with min/max/mean statistics.
| Name | Type | Req | Description |
|---|---|---|---|
| max_elements | integer | – | Arrays longer than this are downsampled |
| name | string | yes | PV name, e.g. 'BL7:MTR1.RBV' |
| Name | Type | Req | Description |
|---|---|---|---|
| age_s | – | yes | Seconds since the IOC timestamp (large = stale value) |
| alarm_limits | – | – | LOLO/HIHI |
| array_summary | – | – | – |
| as_string | – | – | CHAR waveform decoded as a (long) string |
| control_limits | – | – | DRVL/DRVH for output records; writes must lie inside |
| display_limits | – | – | – |
| downsampled | boolean | – | – |
| element_count | integer | yes | – |
| enum_strings | – | – | – |
| name | string | yes | – |
| native_type | string | yes | CA native type: DOUBLE, FLOAT, LONG, INT, CHAR, ENUM or STRING |
| precision | – | – | – |
| severity | string | yes | Alarm severity: NO_ALARM, MINOR_ALARM, MAJOR_ALARM or INVALID_ALARM |
| status | string | yes | Alarm status, e.g. NO_ALARM, HIHI, HIGH, LOW, LOLO, UDF, COMM, TIMEOUT |
| timestamp | – | yes | IOC timestamp of the value (UTC) |
| units | – | – | – |
| value | – | yes | Scalar, string, enum state name, or (possibly downsampled) array |
| warning_limits | – | – | LOW/HIGH |
No examples provided.
get_pvs Get Pvs ~75
Read many PVs at once (e.g. all motors or vacuum gauges of a beamline). PVs that cannot be reached are listed in `errors` instead of failing the whole call.
| Name | Type | Req | Description |
|---|---|---|---|
| max_elements | integer | – | Arrays longer than this are downsampled |
| names | array | yes | PV names |
| Name | Type | Req | Description |
|---|---|---|---|
| errors | array | yes | – |
| readings | array | yes | – |
| timestamp | string | yes | – |
No examples provided.
monitor_pv Monitor Pv ~116
Subscribe to a PV and collect every value change for `duration_s` seconds (or until `max_updates`), then return statistics (min/max/mean/std, drift rate) and the updates.
| Name | Type | Req | Description |
|---|---|---|---|
| duration_s | number | – | How long to collect updates |
| max_points | integer | – | Updates to include in the reply (evenly thinned) |
| max_updates | integer | – | Stop after this many updates |
| name | string | yes | PV name, e.g. 'BL7:MTR1.RBV' |
| Name | Type | Req | Description |
|---|---|---|---|
| duration_s | number | yes | – |
| n_updates | integer | yes | – |
| name | string | yes | – |
| non_finite_updates | integer | – | Numeric updates that were NaN or infinite (not in stats) |
| severities_seen | array | yes | – |
| stats | – | yes | For numeric PVs (arrays: per-update mean), finite values only |
| timestamp | string | yes | – |
| updates | array | yes | Updates (arrays summarised by their mean), at most max_points |
No examples provided.
put_pv Put Pv ~171
Write a PV. This can move motors, open shutters, change magnet or high-voltage setpoints and heat or cool samples: tell the user exactly what will change first. The write is refused unless the PV matches the put allow-list, the IOC grants write access, and the value has the right type and lies within the PV's control limits (DRVL/DRVH). Returns the read-back value.
| Name | Type | Req | Description |
|---|---|---|---|
| name | string | yes | PV name, e.g. 'BL7:MTR1.RBV' |
| timeout_s | number | – | Max seconds to wait for completion |
| value | – | yes | New value: number, enum state name or index, string, or array for waveforms |
| wait | boolean | – | Wait for the IOC's put-completion (put-callback) |
| Name | Type | Req | Description |
|---|---|---|---|
| completed | boolean | yes | True if the IOC confirmed completion (put-callback) |
| elapsed_s | number | yes | – |
| name | string | yes | – |
| previous_value | – | yes | – |
| requested | – | yes | – |
| severity | string | yes | – |
| status | string | yes | – |
| timestamp | string | yes | – |
| value | – | yes | Value read back from the PV after the write |
| warnings | array | yes | – |
No examples provided.
put_pvs Put Pvs ~129
Write several PVs in order (e.g. set both slit blades). Every write is validated first (allow- list, access rights, type, control limits); if any is invalid nothing is written. Writing stops at the first failure and the rest are reported as not written. The whole batch must finish within an hour: writes that would start later are not sent.
| Name | Type | Req | Description |
|---|---|---|---|
| timeout_s | number | – | Max seconds to wait per write |
| wait | boolean | – | Wait for each put-completion before the next write |
| writes | array | yes | PV writes, applied in order |
| Name | Type | Req | Description |
|---|---|---|---|
| error | – | – | – |
| not_written | array | yes | PVs not written because an earlier write failed |
| results | array | yes | – |
| timestamp | string | yes | – |
No examples provided.
pv_info Pv Info ~69
Connection details of a PV: serving IOC host:port, native type, element count, and whether this client has read/write access (EPICS access security) and passes the put allow-list.
| Name | Type | Req | Description |
|---|---|---|---|
| name | string | yes | PV name, e.g. 'BL7:MTR1.RBV' |
| Name | Type | Req | Description |
|---|---|---|---|
| connected | boolean | yes | – |
| element_count | integer | yes | – |
| name | string | yes | – |
| native_type | string | yes | – |
| put_allowed_by_allowlist | boolean | yes | – |
| read_access | boolean | yes | – |
| server | string | yes | host:port of the IOC (or CA gateway) serving the PV |
| timestamp | string | yes | – |
| write_access | boolean | yes | EPICS access security grants this client write access |
No examples provided.
reconnect Reconnect ~35
Close and re-open the connection to the instrument (e.g. after it was power cycled or a cable was re-plugged).
Input schema present but exposes no named parameters.
Structured output declared, but exposes no named fields.
No examples provided.
What is the EPICS Channel Access MCP server?
EPICS Channel Access is an MCP server listed in the public MCP registry as io.github.K-Dense-AI/labmcp-epics. MCP server for EPICS Channel Access: read, monitor and guarded writes of process variables. This page covers its PyPI package (labmcp-epics).
Is the EPICS Channel Access MCP server safe to use?
EPICS Channel Access scores 68 out of 100 on VerifyMCP. We found no known CVEs affecting it as of 30 September 2026. Its build provenance is signed and verified. 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 EPICS Channel Access MCP server expose?
EPICS Channel Access exposes 10 tools: get_connection_info, get_command_log, reconnect, get_pv, get_pvs, and 5 more. Their descriptions and schemas cost roughly 845 tokens of context every time the server is loaded.
Is the EPICS Channel Access MCP server still maintained?
EPICS Channel Access is still listed as active in the MCP registry. We last reached this channel on 30 September 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.
What licence is the EPICS Channel Access MCP server under?
EPICS Channel Access declares the Apache-2.0 licence, which is OSI-approved. That covers the source only, and says nothing about the cost of any service it calls.