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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 Fanout Cloud?

Utilize our vast global network and sophisticated cloud solutions to boost your real-time API functionalities. You can concentrate on developing the endpoints, while we ensure they perform optimally. Retain your existing web infrastructure as Fanout Cloud manages persistent client connections for you. Just let us know when there’s data ready to be sent out. Our system is built to scale effortlessly, accommodating everything from a thousand to a million clients with ease. As you're already busy fine-tuning various elements of your application, allow us to manage this particular aspect for you. Seamless integration is crucial—take advantage of custom domains and data formats or migrate your current real-time API to the cloud without impacting your clients. Your API remains firmly in your command. Rest easy knowing our strong business-grade SLA is part of every paid plan, and even accounts on the hacker tier come with built-in SSL for enhanced security. An unexpected increase in traffic should be a chance for expansion, not a cause for anxiety. Our flexible usage-based pricing model imposes no strict limits; instead, we charge based on the messages sent and the duration clients remain connected, rather than on the number of concurrent connections, facilitating more accurate expense forecasting. In summary, we empower you to concentrate on your core competencies while we take care of everything else, ensuring a smooth and efficient operation. Enjoy the freedom to innovate and grow while we handle the heavy lifting.

Media

No images available

Media

Integrations Supported

Fastly

Integrations Supported

Fastly

API Availability

Has API

API Availability

Has API

Pricing Information

Pricing not provided.
Free Trial Offered?
Free Version

Pricing Information

$25 per month
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

Fastly

Date Founded

2011

Company Location

United States

Company Website

fanout.io/cloud/

Categories and Features

Categories and Features

Application Development

Access Controls/Permissions
Code Assistance
Code Refactoring
Collaboration Tools
Compatibility Testing
Data Modeling
Debugging
Deployment Management
Graphical User Interface
Mobile Development
No-Code
Reporting/Analytics
Software Development
Source Control
Testing Management
Version Control
Web App Development

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