AreaCode.fyi MCP Server
NPM · @RIV-LC/AREACODE-MCP · SCANNED SEP 13
North American (NANP) area-code & phone-number intelligence for AI agents, by areacode.fyi.
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 Security98
- No malware found by supply-chain analysis.Pass
- No known CVEs affecting this package version or its production dependencies.Pass
- No install/post-install scripts declared.Pass
- 32 of 95 dependencies flagged as unhealthy. View diagnostics → Partial
Provenance & Transparency97
- Source repository is publicly reachable at the declared URL. View diagnostics → Pass
- Cryptographically verified build provenance (signed, bound to riv-lc/areacode-mcp). View diagnostics → Pass
- Clear OSI-approved license (MIT).Pass
- Actively maintained (last published 82 days ago).Pass
- Disclosure check failed: no security disclosure policy was found in the source repository. See how to fix → Fail
Schema Quality & AI Usability84
- AI-judged instruction clarity (excellent).Pass
- Tool/resource definitions use about 651 tokens (~81/item across 8 items; 8 tools + 0 resources), lean.Pass
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management97
- Stability observed for 29 of 30 days with no destabilising changes; credit accrues until the full window elapses.Partial
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 8 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
- An AI judge read all 8 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 AreaCode.fyi MCP Server server?
AreaCode.fyi MCP Server runs locally as an npm package, launched with npx -y @riv-lc/areacode-mcp. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.
npm · @riv-lc/areacode-mcp
claude mcp add riv-lc-areacode-mcp -- npx -y @riv-lc/areacode-mcp
{
"mcpServers": {
"riv-lc-areacode-mcp": {
"command": "npx",
"args": [
"-y",
"@riv-lc/areacode-mcp"
]
}
}
} {
"servers": {
"riv-lc-areacode-mcp": {
"command": "npx",
"args": [
"-y",
"@riv-lc/areacode-mcp"
]
}
}
} codex mcp add riv-lc-areacode-mcp -- npx -y @riv-lc/areacode-mcp
{
"$schema": "https://opencode.ai/config.json",
"mcp": {
"riv-lc-areacode-mcp": {
"type": "local",
"command": [
"npx",
"-y",
"@riv-lc/areacode-mcp"
],
"enabled": true
}
}
} openclaw mcp add riv-lc-areacode-mcp --command npx --arg -y --arg @riv-lc/areacode-mcp
mcp_servers:
riv-lc-areacode-mcp:
command: "npx"
args: ["-y", "@riv-lc/areacode-mcp"] {
"McpServers": {
"riv-lc-areacode-mcp": {
"Transport": "stdio",
"Command": "npx",
"Arguments": [
"-y",
"@riv-lc/areacode-mcp"
]
}
}
} assistant mcp add riv-lc-areacode-mcp -t stdio -c npx -a -y @riv-lc/areacode-mcp
{
"mcpServers": {
"riv-lc-areacode-mcp": {
"command": "npx",
"args": [
"-y",
"@riv-lc/areacode-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.
- 13 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.
- 11 Sept 26 +1
- Security disclosure: unverified → fail ▼ functional
- 9 Sept 26 −2
- Security disclosure: fail → unverified ▼ functional
- Stability: pass → 0.83 functional
- 8 Sept 26 0
- Stability: 0.97 → pass security
- 7 Sept 26 +1
- Security disclosure: unverified → fail ▼ functional
- 5 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.
- 4 Sept 26 0
- Security disclosure: fail → unverified ▼ functional
- 3 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.
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 13 Sept 2026 · Analysed npm/@riv-lc/areacode-mcp@0.2.2
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 | npm |
| Reason | Verified |
| Discovered via | Registry attestation endpoint |
| Source repo | riv-lc/areacode-mcp |
| Certificate issuer | https://token.actions.githubusercontent.com |
| Certificate SAN | https://github.com/riv-lc/areacode-mcp/.github/workflows/release.yml@refs/tags/v0.2.2 |
| Rekor log index | 1905825872 |
| Predicate type | https://slsa.dev/provenance/v1 |
| Subject digest | sha512:50d55c0da688e6f203d1a8b4c91aca633e58a16300e68a7a044d1744fed09204c58751821ea82cdbddd9cec88ebd9905be390f1572c769b3f7d852125 |
Background: How many MCP packages publish verified provenance →
Dependencies 95 packages
| Packages resolved | 95 |
|---|---|
| Stale | 32 |
| 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 →
area_codes_for_city Area codes for a city ~82
List the area codes that serve a US or Canadian city. Optionally pass a state/province to disambiguate cities that share a name.
| Name | Type | Req | Description |
|---|---|---|---|
| city | string | yes | City name, e.g. "Las Vegas". |
| state | string | – | Optional state/province name or 2-letter code to disambiguate, e.g. "NV". |
No output schema declared.
No examples provided.
area_codes_for_state Area codes for a state/province ~49
List every area code in a US state or Canadian province.
| Name | Type | Req | Description |
|---|---|---|---|
| state | string | yes | State/province name or 2-letter code, e.g. "Nevada" or "ON". |
No output schema declared.
No examples provided.
check_number_reputation Check a number's community reputation ~97
Return the UNVERIFIED, crowd-sourced community signal for a US/Canada number from areacode.fyi: 'low' (people have looked it up), 'mid'/'high' (it has user reports). Caller ID can be spoofed — this is never proof a specific number is fraudulent.
| Name | Type | Req | Description |
|---|---|---|---|
| number | string | yes | A US/Canada phone number, e.g. "702-555-0199". |
No output schema declared.
No examples provided.
explain_area_code_topic Explain a phone / area-code topic ~37
Source-backed explanation of a phone-numbering topic, suitable for answering end users.
| Name | Type | Req | Description |
|---|---|---|---|
| topic | string | yes | The topic to explain. |
No output schema declared.
No examples provided.
is_scam_area_code Is an area code a scam? ~80
Explain whether an area code is associated with scams. An area code is never a scam by itself; this returns that context plus spoofing notes — caller ID can be faked, so judge calls by what they ask for, not the area code.
| Name | Type | Req | Description |
|---|---|---|---|
| code | string | yes | A 3-digit area code, e.g. "702". |
No output schema declared.
No examples provided.
lookup_area_code Look up an area code ~91
Look up a North American (NANP) area code: country, state/province, principal city and served cities, time zone, current local time, 10-digit-dialing flag, overlay codes, and nearby codes. Returns a canonical areacode.fyi URL and the NANPA source date.
| Name | Type | Req | Description |
|---|---|---|---|
| code | string | yes | A 3-digit area code, e.g. "702". |
No output schema declared.
No examples provided.
lookup_carrier Look up a number's carrier (assigned block) ~109
Look up the carrier, line type (wireless/landline), and rate center that a US/Canada number's NPA-NXX block was assigned to — covering nearly every active area code. Based on public block-allocation data, NOT a live lookup: if the number was ported the current carrier differs. Not for caller identity, fraud, or FCRA decisions.
| Name | Type | Req | Description |
|---|---|---|---|
| number | string | yes | A US/Canada phone number, e.g. "212-555-0143". |
No output schema declared.
No examples provided.
lookup_phone_number Look up a phone number ~106
Parse and validate a US/Canada (NANP) phone number. Returns whether the format is valid, the E.164 form, the area code, the likely region and time zone, and the current local time there. Area-code level only — NOT the caller's identity, exact location, or live carrier; caller ID can be spoofed.
| Name | Type | Req | Description |
|---|---|---|---|
| number | string | yes | A phone number in any format, e.g. "+1 702-555-0199". |
No output schema declared.
No examples provided.
What is the AreaCode.fyi MCP Server server?
AreaCode.fyi MCP Server is listed in the public MCP registry as io.github.riv-lc/areacode-mcp. North American (NANP) area-code & phone-number intelligence for AI agents, by areacode.fyi. This page covers its npm package (@riv-lc/areacode-mcp).
Is the AreaCode.fyi MCP Server server safe to use?
AreaCode.fyi MCP Server scores 96 out of 100 on VerifyMCP. We found no known CVEs affecting it as of 13 September 2026. It declares no install or post-install scripts. 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 AreaCode.fyi MCP Server server expose?
AreaCode.fyi MCP Server exposes 8 tools: lookup_area_code, lookup_phone_number, lookup_carrier, area_codes_for_city, area_codes_for_state, and 3 more. Their descriptions and schemas cost roughly 651 tokens of context every time the server is loaded.
Is the AreaCode.fyi MCP Server server still maintained?
AreaCode.fyi MCP Server is still listed as active in the MCP registry. We last reached this channel on 13 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 AreaCode.fyi MCP Server server under?
AreaCode.fyi MCP Server declares the MIT licence, which is OSI-approved. That covers the source only, and says nothing about the cost of any service it calls.