---
id: snmpsim
version: "1.2.2"
license: BSD-2-Clause
license_treatment: permissive
maintenance: active
---

# snmpsim — SNMP Simulator is a tool that acts as multitude of SNMP Agents built into real physical devices, from SNMP Manager's point of view. Simulator builds and uses a database of physical devices' SNMP footprints to respond like their original counterparts do.

License: permissive · Maintenance: active · Downloads: 203.8K/mo

## What it is and what it does

SNMP Simulator is a pure-Python tool that emulates SNMP agents responding to network queries as if they were real devices. It reads simulation data from plain-text files (OID|TYPE|VALUE format), MIB modules, or external sources like SQL databases and network traffic captures, then responds to SNMP v1, v2c, and v3 queries with the configured data. It supports multiple authentication and encryption algorithms, IPv4 and IPv6, and can simulate many agents simultaneously from a single instance.

The package is intended for testing SNMP management tools, developing monitoring solutions, or learning SNMP protocol behavior without needing actual network hardware. You configure it by pointing it to a data directory, optionally capturing real agent responses or MIB definitions to populate the simulation database, then run the responder command to start accepting queries on a specified endpoint.

Use it for:

- Test SNMP monitoring and management tools against a controlled, reproducible set of simulated devices.
- Develop and debug SNMP client applications without access to real network equipment.
- Generate SNMP test data by capturing responses from existing agents or MIB files for offline testing.
- Simulate network topology changes and device behavior variations by swapping simulation data files.
- Train or demonstrate SNMP protocol concepts in educational environments without hardware dependencies.

## Worth the install?

AI-flagged interpretation of the facts above — verify before relying.

SNMP Simulator creates a pure-Python SNMP agent simulator that responds to SNMP queries (v1/v2c/v3) as if it were multiple real network devices, using configurable data files or plugins.

Yes. SNMP Simulator is actively maintained, has no known vulnerabilities, installs with low friction, and solves a real problem for anyone testing SNMP-based tools or applications. The permissive BSD license poses no restrictions. Install it if you need to test against SNMP agents without physical devices or if you're developing SNMP client code.

## Install

pip install snmpsim
uv add snmpsim
poetry add snmpsim

## Installing snmpsim

Before you install: Low friction: pure-Python wheel with a single runtime dependency (pysnmp). Actively maintained with a recent release (110 days ago) and ongoing commits.

License in practice: BSD-2-Clause is permissive; you can use, modify, and distribute this package with minimal restrictions, provided you include the license notice.

Quickstart:

pip install snmpsim

# Create simulation data file (data/public.snmprec):
# 1.3.6.1.2.1.1.1.0|4|Linux test system
# 1.3.6.1.2.1.1.2.0|6|1.3.6.1.4.1.8072.3.2.10

# Run the simulator:
snmpsim-command-responder --data-dir=./data --agent-udpv4-endpoint=127.0.0.1:1024

Requires Python 3.10 or later (supports_current); pysnmp must be installed as the runtime dependency.

Verify before relying:

- Whether the REST API control plane is included in this package or requires a separate third-party project installation.
- Performance characteristics when simulating tens of thousands of agents simultaneously on typical hardware.
- Whether SQL/noSQL database plugins are bundled or require separate installation.

## Package facts

- License: BSD-2-Clause (permissive)
- Python support: supports_current
- Install friction: low
- Maintenance: active
- Downloads: 203.8K/month (top 15,000 on PyPI)
- Known vulnerabilities: none known

## Tags

snmp agent simulator, snmp mock server, snmp testing tool, simulate snmp devices, snmp v3 responder, network device emulation, snmp protocol testing, snmp-testing, network-simulation, agent-emulation

[View on SkillFed](https://skillfed.io/packages/snmpsim) · [View on PyPI](https://pypi.org/project/snmpsim/)