Hex.pm MCP
REMOTE · HEXPM-MCP.FLY.DEV · SCANNED SEP 23
MCP server for hex.pm and hexdocs.pm: search, inspect, compare, and audit Elixir packages
Available components
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 Security57
- The endpoint's TLS certificate is valid, in date, and uses a strong key. View diagnostics → Pass
- Authorisation not fully verified: no authorisation is required to call this server, and 24 tool(s) never declared a destructiveHint. The MCP spec treats an absent hint as destructive by default, so we cannot call this surface safe. See how to fix → View diagnostics → Unverified
- 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 Usability81
- 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 1078 tokens (~43/item across 25 items; 24 tools + 1 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 Coverage100
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 100% of tool parameters carry a description.Pass
Tool Safety100
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- We read all 24 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
- An AI judge read all 25 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
How do I install the Hex.pm MCP server?
Hex.pm MCP is a hosted endpoint at https://hexpm-mcp.fly.dev/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 · hexpm-mcp.fly.dev
claude mcp add --transport http joshrotenberg-hexpm-mcp 'https://hexpm-mcp.fly.dev/mcp'
{
"mcpServers": {
"joshrotenberg-hexpm-mcp": {
"url": "https://hexpm-mcp.fly.dev/mcp"
}
}
} {
"servers": {
"joshrotenberg-hexpm-mcp": {
"type": "http",
"url": "https://hexpm-mcp.fly.dev/mcp"
}
}
} [mcp_servers.joshrotenberg-hexpm-mcp] url = "https://hexpm-mcp.fly.dev/mcp"
{
"$schema": "https://opencode.ai/config.json",
"mcp": {
"joshrotenberg-hexpm-mcp": {
"type": "remote",
"url": "https://hexpm-mcp.fly.dev/mcp",
"enabled": true
}
}
} openclaw mcp add joshrotenberg-hexpm-mcp --url 'https://hexpm-mcp.fly.dev/mcp' --transport streamable-http
mcp_servers:
joshrotenberg-hexpm-mcp:
url: "https://hexpm-mcp.fly.dev/mcp" {
"McpServers": {
"joshrotenberg-hexpm-mcp": {
"Transport": "http",
"Url": "https://hexpm-mcp.fly.dev/mcp"
}
}
} assistant mcp add joshrotenberg-hexpm-mcp -t streamable-http -u 'https://hexpm-mcp.fly.dev/mcp'
{
"mcpServers": {
"joshrotenberg-hexpm-mcp": {
"type": "http",
"url": "https://hexpm-mcp.fly.dev/mcp"
}
}
} The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.
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.
- 26 Aug 26 0
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 25 Aug 26 79
- Stability: 0.97 → pass security
- 11 Aug 26 0
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 31 Jul 26 0
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 30 Jul 26 0
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 27 Jul 26 0
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 26 Jul 26 0
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 23 Sept 2026 · Probed https://hexpm-mcp.fly.dev/mcp
TLS valid
Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .
| Subject | Issuer | Valid from | Valid until | Key | Signature | Serial |
|---|---|---|---|---|---|---|
| CN=*.fly.dev | CN=YE1,O=Let's Encrypt,C=US | 21 Aug 2026 | 19 Nov 2026 | ECDSA 256 | ECDSA-SHA384 | 688c4daf5300c51e0a5c1f6837a3a67a868 |
| SANs: *.fly.dev | ||||||
| CN=YE1,O=Let's Encrypt,C=US (CA) | CN=Root YE,O=ISRG,C=US | 3 Sept 2025 | 2 Sept 2028 | ECDSA 384 | ECDSA-SHA384 | 5ddd70dd31f801c85c186a7a04b80afe |
| CN=Root YE,O=ISRG,C=US (CA) | CN=ISRG Root X2,O=Internet Security Research Group,C=US | 13 May 2026 | 2 Sept 2032 | ECDSA 384 | ECDSA-SHA384 | 872165fc34b6e5fba8add5b3705fb53a |
| CN=ISRG Root X2,O=Internet Security Research Group,C=US (CA) | CN=ISRG Root X1,O=Internet Security Research Group,C=US | 13 May 2026 | 2 Sept 2032 | ECDSA 384 | SHA256-RSA | 6c8f1dc727c7117f7baf853ac980f9cd |
Background: What to check on a remote MCP endpoint →
DNSSEC insecure
Validation of hexpm-mcp.fly.dev. — Not signed
| Zone | DS | Keys | Algorithms | Outcome |
|---|---|---|---|---|
| . | trust_anchor | 20326, 38696 | 8, 8 | Verified |
| dev. | present | 60074 | 8 | Verified |
| fly.dev. | absent | 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 |
Background: How OAuth 2.1 works in the 2026 MCP spec →
Transports 2 probes
| Transport | URL | Outcome | Status | Location |
|---|---|---|---|---|
| streamable-http | https://hexpm-mcp.fly.dev/mcp | Verified | 200 | |
| http (plaintext) | http://hexpm-mcp.fly.dev/mcp | HTTPS enforced | 301 | https://hexpm-mcp.fly.dev/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 →
alternatives ~31
Find and compare alternative packages for a given hex.pm package.
| Name | Type | Req | Description |
|---|---|---|---|
| name | string | yes | Package name on hex.pm |
No output schema declared.
No examples provided.
audit ~62
Audit a package's dependencies for risks. Checks each dependency for retired versions, stale packages, single-owner packages, and known vulnerabilities via OSV.dev.
| Name | Type | Req | Description |
|---|---|---|---|
| name | string | yes | Package name on hex.pm |
| version | string | – | Release version (defaults to latest) |
No output schema declared.
No examples provided.
audit_mix_deps ~56
Audit mix.exs dependencies for risks.
| Name | Type | Req | Description |
|---|---|---|---|
| deps | string | yes | Mix.exs deps list as text, e.g. {:phoenix, "~> 1.7"}, {:ecto, "~> 3.10"} |
No output schema declared.
No examples provided.
compare ~38
Compare 2-5 hex.pm packages side by side.
| Name | Type | Req | Description |
|---|---|---|---|
| packages | string | yes | Comma-separated list of package names (2-5 packages) |
No output schema declared.
No examples provided.
dep_tree ~72
Get the full transitive dependency tree for a package (BFS, max depth 5).
| Name | Type | Req | Description |
|---|---|---|---|
| max_depth | integer | – | Maximum depth to traverse (default 5, max 5) |
| name | string | yes | Package name on hex.pm |
| version | string | – | Release version (defaults to latest) |
No output schema declared.
No examples provided.
dependencies ~39
Get dependencies for a package version.
| Name | Type | Req | Description |
|---|---|---|---|
| name | string | yes | Package name on hex.pm |
| version | string | – | Release version (defaults to latest) |
No output schema declared.
No examples provided.
doc_item ~59
Get full documentation for a specific module or function.
| Name | Type | Req | Description |
|---|---|---|---|
| module | string | yes | Module name (e.g. "Plug.Conn") |
| name | string | yes | Package name on hex.pm |
| version | string | – | Package version (defaults to latest) |
No output schema declared.
No examples provided.
docs ~39
Browse package documentation -- module listing.
| Name | Type | Req | Description |
|---|---|---|---|
| name | string | yes | Package name on hex.pm |
| version | string | – | Package version (defaults to latest) |
No output schema declared.
No examples provided.
downloads ~28
Get download statistics for a hex.pm package.
| Name | Type | Req | Description |
|---|---|---|---|
| name | string | yes | Package name on hex.pm |
No output schema declared.
No examples provided.
features ~42
Get optional features/extras for a package release.
| Name | Type | Req | Description |
|---|---|---|---|
| name | string | yes | Package name on hex.pm |
| version | string | – | Release version (defaults to latest) |
No output schema declared.
No examples provided.
health ~28
Comprehensive health check for a hex.pm package.
| Name | Type | Req | Description |
|---|---|---|---|
| name | string | yes | Package name on hex.pm |
No output schema declared.
No examples provided.
info ~28
Get detailed information about a hex.pm package.
| Name | Type | Req | Description |
|---|---|---|---|
| name | string | yes | Package name on hex.pm |
No output schema declared.
No examples provided.
owners ~30
Get owners/maintainers of a hex.pm package.
| Name | Type | Req | Description |
|---|---|---|---|
| name | string | yes | Package name on hex.pm |
No output schema declared.
No examples provided.
readme ~43
Get the README content for a hex.pm package.
| Name | Type | Req | Description |
|---|---|---|---|
| name | string | yes | Package name on hex.pm |
| version | string | – | Package version (defaults to latest) |
No output schema declared.
No examples provided.
release ~47
Get detailed information about a specific package release.
| Name | Type | Req | Description |
|---|---|---|---|
| name | string | yes | Package name on hex.pm |
| version | string | yes | Release version (e.g. "1.8.5") |
No output schema declared.
No examples provided.
search ~66
Search for packages on hex.pm by name/keywords.
| Name | Type | Req | Description |
|---|---|---|---|
| page | integer | – | Page number (default 1) |
| query | string | yes | Search query string |
| sort | string | – | Sort by: name, recent_downloads, total_downloads, inserted_at, updated_at |
No output schema declared.
No examples provided.
search_docs ~51
Search within a package's documentation by name.
| Name | Type | Req | Description |
|---|---|---|---|
| name | string | yes | Package name on hex.pm |
| query | string | yes | Search query |
| version | string | – | Package version (defaults to latest) |
No output schema declared.
No examples provided.
toolbox_category ~80
List the curated projects in an Elixir Toolbox category.
| Name | Type | Req | Description |
|---|---|---|---|
| category | string | yes | Category slug within the group (e.g. "frameworks") |
| group | string | yes | Group slug (e.g. "web", "ai") |
| sort | string | – | Ordering: "name" (alphabetical) or "downloads"; defaults to popularity order |
No output schema declared.
No examples provided.
toolbox_group ~37
List the categories in a single Elixir Toolbox group.
| Name | Type | Req | Description |
|---|---|---|---|
| group | string | yes | Group slug (e.g. "web", "ai") |
No output schema declared.
No examples provided.
toolbox_groups ~20
Browse the Elixir Toolbox curated taxonomy of groups and categories.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
toolbox_search ~49
Search packages via Elixir Toolbox. Results carry GitHub/GitLab stats, popularity, and health signals not exposed by the raw hex.pm search.
| Name | Type | Req | Description |
|---|---|---|---|
| query | string | yes | Search query string |
No output schema declared.
No examples provided.
toolbox_trending ~32
List trending Elixir packages from Elixir Toolbox.
| Name | Type | Req | Description |
|---|---|---|---|
| limit | integer | – | Maximum number of projects to return |
No output schema declared.
No examples provided.
upgrade_check ~57
Check which mix.exs dependencies have newer versions available.
| Name | Type | Req | Description |
|---|---|---|---|
| deps | string | yes | Mix.exs deps list as text, e.g. {:phoenix, "~> 1.7"}, {:ecto, "~> 3.10"} |
No output schema declared.
No examples provided.
versions ~28
List all versions of a hex.pm package.
| Name | Type | Req | Description |
|---|---|---|---|
| name | string | yes | Package name on hex.pm |
No output schema declared.
No examples provided.
What is the Hex.pm MCP server?
Hex.pm MCP is listed in the public MCP registry as io.github.joshrotenberg/hexpm-mcp. MCP server for hex.pm and hexdocs.pm: search, inspect, compare, and audit Elixir packages. This page covers its hosted endpoint (https://hexpm-mcp.fly.dev/mcp).
Is the Hex.pm MCP server safe to use?
Hex.pm MCP scores 79 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 Hex.pm MCP server expose?
Hex.pm MCP exposes 24 tools: alternatives, audit, audit_mix_deps, compare, dep_tree, and 19 more. Their descriptions and schemas cost roughly 1,062 tokens of context every time the server is loaded.
Does the Hex.pm MCP server require authentication?
No. We connected to Hex.pm MCP without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.
Is the Hex.pm MCP server still maintained?
Hex.pm MCP is still listed as active in the MCP registry. We last reached this channel on 23 September 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.