This spotlight is part of our MCP company spotlights, within The MCP Guide. Building an MCP company? See SEO and GEO for MCP companies.
Blaxel is a cloud for AI agents. Its main product is fast-starting sandboxes. For MCP, it hosts your MCP servers as serverless workloads and can turn an OpenAPI spec into a "code mode" MCP server.
Checked against: Blaxel's MCP servers documentation on 28 October 2026. eSEOspace did not test Blaxel's products.
Key Takeaways
- Blaxel's MCP Server Hosting runs remote MCP servers without you managing infrastructure.
- Servers must use streamable HTTP and have a maximum runtime of 15 minutes, per Blaxel's docs.
- You can deploy prebuilt servers from the Blaxel Store, your own code, or a converted stdio server.
- Code mode turns an OpenAPI spec into a server where agents search endpoints and run code in a sandbox.
- Pricing is usage-based, with up to $200 in free credits and MCP hosting billed per GB of RAM per second.
At a glance
| Item | Details |
|---|---|
| Company | Blaxel |
| What it offers for MCP | Serverless MCP hosting, SDKs, code mode servers from OpenAPI, built-in sandbox MCP server |
| Who it's for | Developers running agents and their tools on one platform |
| Open source? | Parts: Blaxel says its Supergateway and SDK are open source |
| Pricing | Pay as you go ($0 base + usage); custom deployments by quote |
| Founded / HQ | San Francisco, per its about page |
What Blaxel offers for MCP
MCP server hosting
Blaxel's MCP docs describe "a serverless computing service that allows you to host remote MCP servers." You provide the code, and Blaxel handles hosting, scaling and "one single global endpoint." Tracing and observability are included.
The docs list two limits. Your server "must implement streamable HTTP," and deployed servers "have a maximum runtime of 15 minutes." Hosted servers cannot be installed locally. Blaxel calls MCP servers functions in its API.
There are three ways to get a server running:
- Deploy a prebuilt server from the Blaxel Store, such as Google Maps or Gmail.
- Build a custom server in TypeScript or Python with the Blaxel SDK, testing locally with MCP Inspector.
- Adapt an existing stdio server to streamable HTTP and deploy it.
Deployment works from the CLI, a GitHub integration or a Dockerfile. If transports are new to you, see our lesson on deploying a remote MCP server.
Code mode from OpenAPI
Blaxel's code mode docs say you can "turn any OpenAPI specification into a code mode MCP server." The agent calls search to find the right endpoint, then execute with a short fetch() script. Blaxel runs that script in a sandbox and injects credentials.
This pattern keeps the tool list to two tools instead of one per endpoint. The docs credit the idea to posts by Cloudflare and Anthropic on code execution with MCP.
Sandboxes with MCP built in
Every Blaxel sandbox also "exposes a built-in MCP server" for files, processes, ports and previews, per its docs index. That lets an agent operate a sandbox through tool calls.
Who it's for
Blaxel fits developers who already run agents or code sandboxes and want MCP servers on the same private network. Its pricing page says MCP servers run "as first-class workloads on the same private network as your agents," and "tool calls never leave Blaxel."
Pricing
Blaxel's pricing page lists two options as of October 2026:
| Plan | Price | Notes |
|---|---|---|
| Pay as you go | $0 + usage | Up to $200 in free credits, all products, tier-based quotas, Discord support |
| Custom | Quote | Dedicated and custom deployments |
MCP hosting is billed at $0.000007 per GB of RAM per second of active compute. A custom domain for one app costs $0.25 a month. Because servers scale to zero when idle, cost tracks real use.
Security and trust
Blaxel's security page lists "SOC 2, HIPAA, ISO 27001." It says reports and sub-processor lists are on a compliance portal, where you can request the full SOC 2 report. A HIPAA Business Associate Agreement is available.
The pricing page also lists outbound firewall controls, static IPs and a managed egress proxy for secret injection. Our MCP security hub covers what to check before you host tools that touch company data.
Alternatives
- Prefect hosts servers through Horizon, with FastMCP as its framework.
- Alpic hosts MCP servers and apps aimed at ChatGPT and Claude listings.
- Manufact hosts and tests MCP servers, built around mcp-use.
Browse more MCP company spotlights.
Next step
Check your longest tool call first. If any task runs past 15 minutes, redesign it before you pick a serverless host. Our MCP development team can help.
Frequently asked questions
Can I host an existing stdio MCP server on Blaxel?
Not directly. Blaxel's docs say servers must use streamable HTTP. They include a quickstart for converting a stdio server first.
How long can an MCP server run on Blaxel?
The docs list a maximum runtime of 15 minutes for deployed MCP servers.
What is code mode?
It turns an OpenAPI spec into an MCP server with search and execute tools. The agent writes a short script, and Blaxel runs it in a sandbox.
How is MCP hosting billed?
The pricing page lists $0.000007 per GB of RAM per second of active compute. New accounts get up to $200 in free credits.
