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About

FetchSandbox helps you test the integrations your AI wrote without touching production. From API request to production-ready integration, it lets developers build, test, and validate API integrations in realistic environments before deployment, catching failures early, reducing debugging time, and shipping with confidence. Instead of relying on static mocks, fake success responses, or risky production keys, FetchSandbox gives teams runnable API environments that behave like real services. Its stateful API sandbox keeps state across requests, enforces lifecycle transitions, fires real webhook events, and supports multi-step flows where integrations usually break. Developers can use the MCP Server, CLI, web app, OpenAPI import, and monitoring tools to prove an integration against APIs such as Stripe, Resend, Clerk, GitHub, Paddle, and Shopify.

About

Twinbay is a hosted API simulation platform for developers testing AI agents and applications that call third-party services. Its stateful API twins can return configurable responses and model conditions such as payment declines, rate limits, expired credentials, email bounces, and paginated results. Teams direct compatible SDK requests to a twin, create isolated environments for test runs, inspect request logs, and use the environments in development or CI. The catalog includes twins for services such as GitHub, HubSpot, Plaid, Resend, Klaviyo, Linear, NetSuite, and QuickBooks. Twinbay offers a free plan with limits on twin usage and environment duration, pay-as-you-go twin-hour billing, and an Enterprise option. It is designed for engineers who need repeatable tests of agent behavior without relying on live production accounts or shared provider sandboxes.

Platforms Supported

Windows Not Supported
Mac Not Supported
Linux Not Supported
Cloud Supported
On-Premises Not Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported

Platforms Supported

Windows Not Supported
Mac Not Supported
Linux Not Supported
Cloud Supported
On-Premises Not Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported

Audience

Developers and engineering teams that need to build, test, and validate API integrations in realistic sandbox environments before deployment

Audience

Engineers at AI startups and larger companies who build agents that call third-party SaaS and fintech APIs, including CRM, accounting, payments, email, issue tracking, and developer tools.

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Supported

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Supported

API

Offers API Supported

API

Offers API Not Supported

Screenshots and Videos

Screenshots and Videos

No images available

Pricing

$5 per month
Free Version Supported
Free Trial Not Supported

Pricing

$1/twin-hour
A free plan includes up to 5 twins and 1-hour environments. Pay-as-you-go is $1 per twin-hour, billed by the second. Enterprise pricing is custom and annual. Eligible startups may receive $5,000 in credits over 24 months.
Free Version Supported
Free Trial Not Supported

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Training

Documentation Supported
Webinars Not Supported
Live Online Not Supported
In Person Not Supported

Training

Documentation Supported
Webinars Not Supported
Live Online Not Supported
In Person Not Supported

Company Information

FetchSandbox
Founded: 2026
United States
fetchsandbox.com

Company Information

Twinbay
Founded: 2024
United States
twinbay.ai

Alternatives

Alternatives

Keysight Eggplant

Keysight Eggplant

Keysight Technologies
SOAtest

SOAtest

Parasoft

Categories

API Design Supported

Categories

AI Testing Tools Supported
API Testing Supported

Integrations

GitHub Supported
Resend Supported
Shopify Supported
Stripe Supported
AgentMail Supported
BILL Not Supported
Cursor Supported
HubSpot CRM Not Supported
Klaviyo Not Supported
Kulipa Supported
NetSuite Not Supported
Notion Not Supported
Paddle Supported
QuickBooks Enterprise Not Supported
Sendmux Supported
Slack Not Supported
Tally Not Supported
WebEDI.com Not Supported
Windsurf Browser Supported
Zendesk Not Supported

Integrations

GitHub Supported
Resend Supported
Shopify Supported
Stripe Supported
AgentMail Not Supported
BILL Supported
Cursor Not Supported
HubSpot CRM Supported
Klaviyo Supported
Kulipa Not Supported
NetSuite Supported
Notion Supported
Paddle Not Supported
QuickBooks Enterprise Supported
Sendmux Not Supported
Slack Supported
Tally Supported
WebEDI.com Supported
Windsurf Browser Not Supported
Zendesk Supported
Claim FetchSandbox and update features and information
Claim FetchSandbox and update features and information
Claim Twinbay and update features and information
Claim Twinbay and update features and information