SV Number MCP Server — Watchlist

MCP100 Assessment

Watchlist / Tracking

Why we’re tracking it

Track provider availability and credential boundaries because number and SMS actions are sensitive

Reviewed Oct 5, 2026 · Documentation review; complete setup workflow not independently tested

Best fit

Temporary phone-number activation and SMS verification workflows for agents.

What we know

Commercial-service MCP for checking balance/catalogs, ordering temporary numbers, polling SMS codes and finishing/cancelling activations.

Maintenance / activity evidence

Observed Aug 10, 2026 (UTC)drop smithery.yaml: Smithery publishes stdio servers as .mcpb bundles…

Tracking evidence observed Oct 5, 2026. These dated signals do not establish current maintenance. Reviewed enrichment confidence: high.

Activity source · commits ↗Activity source · releases ↗

Verification gaps / watch-outs

Installation and comprehensive security have not been independently audited.
Paid activation/account authority. Writes: Order paid numbers; Finish/cancel activations; Request another SMS.
SVN API key.
Sensitive access: SMS verification codes, Temporary numbers, Account balance

Handles authentication material and paid operations; keep use within service policies and non-sensitive account classes.

Security source · repository notice ↗

Full authority, access and evidence limits are available in Review context and Access & risk.

Popularity

551 repository stars

Stars observed Sep 25, 2026.

Do not overwrite existing reviewed stars/download metrics with nulls from this enrichment batch.

All limitations / Review context

Which number and verification operations and account controls are currently documented?

The bounded assessment reviewed the official README, repository notices, security policy path, and security page for known material public-tracking blockers. No such blocker was identified. This is a public-tracking assessment, not an installation safety certification.

Handles authentication material and paid operations; keep use within service policies and non-sensitive account classes.
Paid activation/account authority.
SVN API key.
Phone numbers and verification codes are returned through MCP.
Reviewed write actions: Order paid numbers; Finish/cancel activations; Request another SMS
Sensitive access: SMS verification codes, Temporary numbers, Account balance
Installation, client compatibility and comprehensive security have not been independently audited. Authentication and access depend on the configured services.
A project-specific SECURITY.md policy was not available at the fetched official path; the review remains limited to published repository notices.
No installation, runtime, client matrix, or complete tool-contract audit was performed in this review.
The fetched official SECURITY.md path returned HTTP 404; it was not treated as positive evidence.
Requires a funded service account; no free tier.
Not intended for banking, payment or government accounts.
Availability and delivery vary.

Original activity observations

2026-08-10T18:55:24Z: drop smithery.yaml: Smithery publishes stdio servers as .mcpb bundles…

Technical identity

github.com/sv-number/mcp-server

Exact implementation source: https://github.com/sv-number/mcp-server ↗
Reviewed resource type: MCP Server
Repository identity: sv-number/mcp-server
Package identity: npm:sv-number-mcp

Evidence & Sources

Evidence basis: Recorded source evidence
Setup runtime verification: Not independently runtime-tested by MCP100 for this setup workflow.

Reviewed Oct 5, 2026 · Latest source observation Oct 7, 2026

GitHub repository ↗
sv-number/mcp-server
Recorded repository material and project history.

Setup · Watchlist

Install & Agents

Publisher instructions.

Source evidence observed Oct 14, 2026.

Additional setup details required — see the specific gaps below.

Install / connect
Publisher instructions
SV Number MCP is a paid disposable-number/SMS verification tool.
publisher documented step · Publisher instructions
claude mcp add sv-number --env SVN_API_KEY=your_key_here -- npx -y sv-number-mcp
Configure / authenticate
MCP100 setup guide
Register publisher CLI via `claude mcp add sv-number --env SVN_API_KEY=your_key_here -- npx -y sv-number-mcp` only when intended and legal; its README also shows a generic client JSON.
Check connection
Suggested check
List available tools or server registration only. Do not purchase phone numbers or receive verification SMS during installation checks.
Remove / uninstall / revoke
MCP100 setup guide
Use `claude mcp remove sv-number` if installed via the publisher's shown Claude command. No service package removal needed for npx on-demand startup; remove any static SVN_API_KEY references from client config.
Client unregistration, program uninstall, persistent-data deletion, and credential revocation must be treated separately.
Remove client registration · Claude Code only · MCP100 composed guide
claude mcp remove sv-number

Official Documentation & Sources

What it does

Commercial-service MCP for checking balance/catalogs, ordering temporary numbers, polling SMS codes and finishing/cancelling activations.

Capability: Communication
Resource type: MCP Server
Industry: Telecommunications
Best fit: Temporary phone-number activation and SMS verification workflows for agents.

Representative uses

Order a number
Poll verification SMS
Finish/cancel/refund activation
Check service/country/operator availability

Limitations

Requires a funded service account; no free tier.
Not intended for banking, payment or government accounts.
Availability and delivery vary.

Reviewed access

Access & risk

Review the exact access boundary before connecting this MCP to accounts, credentials, or sensitive data.

Authentication: SVN API key.
Permissions: Paid activation/account authority.
Data handling: Phone numbers and verification codes are returned through MCP.
Cost: paid
Risk and cautions: Handles authentication material and paid operations; keep use within service policies and non-sensitive account classes.

Access scope and cautions

Write actions: Order paid numbers Finish/cancel activations Request another SMS
Sensitive access: SMS verification codes Temporary numbers Account balance
Risk level: high

FAQ

Based on reviewed evidence as of 2026-10-07. Watchlist tracking is not a recommendation or a security certification.

Which tasks are documented for this implementation?

The reviewed tasks include: Order a number; Poll verification SMS; Finish/cancel/refund activation; Check service/country/operator availability.

What setup and authentication are documented?

Recorded installation/entrypoint step: npx -y sv-number-mcp. Recorded transport: stdio. Recorded environment-variable notes: SVN_API_KEY; SVN_API_BASE optional; SVN_LANG optional. No configuration values are supplied here. Prerequisites: Funded account. These are the documented setup details, not a claim that installation or client compatibility was independently tested. Authentication: SVN service API key.

Can it modify data or perform write operations?

Documented write actions include: Order paid numbers; Finish/cancel activations; Request another SMS. Recorded permission boundary: Paid activation/account authority.

What data-handling boundary should I consider?

Phone numbers and verification codes are returned through MCP. Recorded sensitive-access context: SMS verification codes; Temporary numbers; Account balance.

What limitations and risks should I check before use?

Handles authentication material and paid operations; keep use within service policies and non-sensitive account classes. Requires a funded service account; no free tier. Not intended for banking, payment or government accounts. Availability and delivery vary. A project-specific SECURITY.md policy was not available at the fetched official path; the review remains limited to published repository notices.

What cost model is recorded?

The reviewed cost model is paid. This classification does not establish current prices, quotas or the cost of every downstream operation. Check the applicable service terms before authorizing paid actions.

Is this an official MCP?

sv-number is listed as First-party MCP in MCP100’s current evidence.