Tool profile
Scalar: cost, fit and limits
Scalar is an API documentation and tooling platform that turns an OpenAPI document into hosted reference docs, an API client, generated SDKs and hosted MCP servers, for API teams that keep their specification in Git. The pages do not state its legal entity.
What to know first
Scalar has four plans: Free at $0, Pro at $150 a month or $125 billed yearly, Business at $600 a month or $500 yearly, and a custom Enterprise tier. Each plan sets caps on APIs, SDK endpoints, editor seats and monthly credits. New teams get a 7 day trial with Pro limits. No privacy policy page was found, so data handling is unverified.
Scalar at a glance
| Maker | Scalar (legal entity not stated on the opened pages), Not stated on the vendor pages |
|---|---|
| Free plan | Yes |
| Entry price | $0 on Free, $150 per month on Pro ($125 billed yearly) |
| API access | Yes |
| Category | Best AI API Documentation Tools in 2026, rank 2 of 11 |
| Website | scalar.com |
Who Scalar is best for
API platform teams
One OpenAPI document feeds the docs site, the built-in API client, SDKs and MCP servers, so a team that treats the spec as the source of truth maintains a single file.
Teams opening an API to AI agents
Hosted MCP servers on your own subdomain support OAuth and rate limits, and the usage view shows call counts, errors and latency per tool without storing arguments.
Teams that ship client libraries
Generated SDKs publish to npm, PyPI, Go modules, Maven Central and RubyGems, and the free plan includes one SDK up to 25 endpoints for a first test.
Scalar plans and pricing
| Plan | Price | What it includes |
|---|---|---|
| Free | $0 | Hosted OpenAPI docs, built-in API client, landing pages, up to 3 APIs, 1 SDK up to 25 endpoints, 50 Agent Scalar credits and 1 editor seat. |
| Pro | $150 per month, or $125 per month billed yearly | Custom domains, Git Sync, Markdown and MDX, up to 15 APIs, 1 SDK up to 100 endpoints, access groups, hosted MCP servers, 500 credits and 5 editor seats. |
| Business | $600 per month, or $500 per month billed yearly | Everything in Pro plus SSO and subpath hosting, up to 25 APIs, 1 SDK up to 250 endpoints, discounts on extra SDKs, 2,000 credits and 10 editor seats. |
| Enterprise | Custom | Full developer portals, SSO and SAML with RBAC, unlimited APIs, custom SDK size, priority support with SLAs, plus SDK and MCP migration services. |
Checked November 2026.
What Scalar does
- OpenAPI-backed MCP servers
- Servers generated from the OpenAPI document run on the customer's subdomain with OAuth and rate limits. A fixed tool set is said to use about 0.2% of an assistant's context.
- Docs for agents
- Pages are available as Markdown, with an llms.txt file and a Docs MCP endpoint, so a coding assistant can read the reference without scraping rendered HTML.
- Generated SDKs
- SDKs publish to npm, PyPI, Go modules, Maven Central and RubyGems. Additional SDKs cost $150 a month each for up to 100 endpoints or $600 for 101 to 250.
- MCP observability
- Call counts, errors and latency are shown per tool and per client for hosted MCP tools, with arguments not stored, which helps a team see which endpoints agents actually use.
- Two-way Git sync
- Docs sync both ways with Git on Pro and above, and a registry of APIs keeps several specs findable. Free users publish from the hosted editor instead.
How Scalar handles your data
No privacy policy page was found at the addresses tried, so the vendor's policy was not checked for this. The pricing page does not say whether customer content or documentation questions train AI models, how long data is kept or where it is hosted, and it names no certifications. It does say that MCP observability stores no tool arguments. One credit covers 200 MCP tool calls, 2 Docs chat messages or 50,000 reference model tokens. Ask the vendor for a data processing statement before connecting private APIs.
Where Scalar falls short in practice
- Credits expire and cap AI use. Free has 50 credits, Pro 500 and Business 2,000 a month, and unused credits do not roll over. Docs chat at 2 messages per credit makes a busy public site drain Free quickly.
- Extra SDKs cost as much as a plan. Each additional SDK is $150 a month up to 100 endpoints and $600 for 101 to 250 endpoints, so a company shipping libraries in five languages pays well above the plan price.
- Publishing needs a paid plan. Free does not include custom domains, and publishing a docs site needs a paid plan once the 7 day trial ends, so Free works as an evaluation, not a launch.
Works with
Alternatives to Scalar
Scalar: common questions
How many MCP calls does one Scalar credit cover?
One credit covers 200 MCP tool calls, 2 Docs chat messages or 50,000 reference model tokens, according to the pricing page. Free includes 50 credits, Pro 500 and Business 2,000 a month, and credits do not roll over, so estimate agent traffic before choosing a plan.
Can I host an MCP server for my API with Scalar?
Yes. Pro lists hosted MCP servers, and the vendor describes servers generated from the OpenAPI document on your own subdomain with OAuth and rate limits. Free does not list hosted MCP servers, so test on the 7 day trial before relying on it.
Which package registries does Scalar publish SDKs to?
Scalar lists npm, PyPI, Go modules, Maven Central and RubyGems. Free includes one SDK up to 25 endpoints, Pro one up to 100 and Business one up to 250. Extra SDKs cost $150 or $600 a month each, depending on endpoint count.
Does Scalar publish a privacy policy?
No privacy policy page was found at the addresses we tried, and the pricing page names no certifications, hosting region or training statement. A buyer with compliance duties should ask for a data processing agreement and a security summary, since the public pages do not answer these questions.
What does Scalar's free plan limit?
Free caps the account at 3 APIs, 1 SDK up to 25 endpoints, 50 Agent Scalar credits and 1 editor seat. It excludes custom domains and extra SDKs, and publishing a docs site needs a paid plan after the 7 day trial given to new teams.