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What is Spanlens?

Spanlens is an open-source observability tool under the MIT license that allows developers to seamlessly monitor their applications' interactions with various services, including OpenAI, Anthropic, and others. The integration is remarkably straightforward; developers can either modify the client's baseURL to point to the Spanlens proxy with a single line of code or use the command "npx @spanlens/cli init," which activates a wizard for automatic code adjustments. After integration, the platform logs all requests in detail, tracking essential metrics such as model type, token counts, latency, costs, and the entire prompt and response body, while also effectively reconstructing streaming outputs. The platform's dashboard converts this extensive log information into valuable operational insights. With cost tracking capabilities, users can analyze their spending by specific requests, models, and users, along with differentiating prompt-cache tokens to clarify actual savings beyond total costs. Furthermore, agent tracing illustrates multi-step workflows through Gantt waterfalls and node-and-edge graphs, highlighting critical paths to help developers identify the slowest dependencies in complex scenarios. This thorough approach not only improves visibility but also equips users with the tools necessary to refine their model interactions for enhanced efficiency and effective cost management, fostering a more productive development environment overall.

What is OpenTools?

OpenTools acts as a comprehensive API platform that allows developers to augment large language models (LLMs) with versatile functionalities such as web searches, location data, and web scraping, all facilitated through a unified interface. By linking to a network of Model-Context Protocol (MCP) servers, OpenTools allows LLMs to access various tools without needing individual API keys for each one. The platform is engineered to work seamlessly with many LLMs, including those supported by OpenRouter, and is designed to be resilient against service disruptions, enabling smooth transitions among different models. Developers can effortlessly activate tools through simple API requests, specifying their desired model and tools, while OpenTools takes care of both authentication and execution. Impressively, users are charged solely for successful tool executions, employing a straightforward, transparent token pricing model that is managed via an efficient billing interface. This approach significantly simplifies the integration of external tools into LLM applications and lessens the complexity involved in handling multiple APIs, rendering it a compelling choice for developers focused on maximizing efficiency in their endeavors. Ultimately, OpenTools stands out as a groundbreaking advancement in enhancing language model capabilities by streamlining access to essential external resources, thereby fostering innovation in the development of sophisticated applications.

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Integrations Supported

Brave Browser
Claude
Exa
Firecrawl
Google Maps
Model Context Protocol (MCP)
OpenAI
OpenRouter

Integrations Supported

Brave Browser
Claude
Exa
Firecrawl
Google Maps
Model Context Protocol (MCP)
OpenAI
OpenRouter

API Availability

Has API

API Availability

Has API

Pricing Information

Pricing not provided.
Free Trial Offered?
Free Version

Pricing Information

Free
Free Trial Offered?
Free Version

Supported Platforms

SaaS
Android
iPhone
iPad
Windows
Mac
On-Prem
Chromebook
Linux

Supported Platforms

SaaS
Android
iPhone
iPad
Windows
Mac
On-Prem
Chromebook
Linux

Customer Service / Support

Standard Support
24 Hour Support
Web-Based Support

Customer Service / Support

Standard Support
24 Hour Support
Web-Based Support

Training Options

Documentation Hub
Webinars
Online Training
On-Site Training

Training Options

Documentation Hub
Webinars
Online Training
On-Site Training

Company Facts

Organization Name

Spanlens

Date Founded

2026

Company Location

South Korea

Company Website

spanlens.io

Company Facts

Organization Name

OpenTools

Company Location

United States

Company Website

opentools.com

Categories and Features

Categories and Features

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