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Connector Upgrade and Rescue

Move to 2026-07-28, add Client ID Metadata Documents, fix annotations, respond to a rejection.

Price
$2,500 to $5,000
Timeline
1 to 2 weeks
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Problem

If your MCP server was built before the 2026-07-28 spec, it may depend on sessions or the initialize handshake, register clients dynamically, or ship tools without the annotations reviewers check.

Listings also move: legacy Console-form submissions belong in the new portal, and MCPB listings need converting.

Stainless is winding down all its hosted products after joining Anthropic (May 18, 2026), so teams that rely on hosted Stainless MCP need a migration path.

Who it's for

A good fit

  • Teams with an MCP server built before the 2026-07-28 spec
  • Teams whose submission was rejected and who need the fixes and a response
  • Teams on Stainless-hosted MCP that need to move

Not a fit

  • Teams without an MCP server yet. That is the Connector Launch Sprint.
  • Teams that want us to host the server. It runs on your infrastructure.

What we do

We audit your server, migrate it to 2026-07-28 and fix what blocks listing. The migration removes session dependence, adds server/discover and updates error codes. We add Client ID Metadata Documents, fix annotations and consolidate tools where a smaller set works better.

If a platform rejected your submission, we fix what the reviewers flagged and respond from your accounts.

Deliverables

  • A stateless 2026-07-28 migration: no session dependence, `server/discover` and updated error codes
  • Client ID Metadata Documents
  • Annotation fixes and tool consolidation
  • Legacy Console-form submissions moved to the new portal
  • MCPB listings converted
  • A response to a rejection, with the fixes it asks for
  • Migration off Stainless-hosted MCP

Process

  1. 5 business days

    Audit

    We audit the server, list what blocks listing and fix the price.

  2. 1 to 2 weeks

    Migration and fixes

    Changes land in your repository as we make them.

  3. Set by each platform

    Resubmission

    Where a listing needs it, we resubmit from your accounts.

Timeline

1 to 2 weeks after the Audit, plus platform review time when a resubmission is needed.

Pricing

$2,500 to $5,000

1 to 2 weeks

How the price is set
By the number of tools and whether your auth needs changes. The Audit fixes the price before work starts.
Payment
50% at kickoff and 50% on delivery.

What you provide

  • Access to the server's repository
  • Any reviewer feedback or rejection notices you have received
  • A reviewer test account with realistic data

What you receive

  • An upgraded server on the 2026-07-28 spec, in your repository
  • A written summary of every change and why it was made
  • Resubmission from your accounts, where a listing needs it

Acceptance criteria

  • Passes MCP Inspector and each platform's validation on the current spec
  • Eval pass rate of 90% or more
  • No tool depends on session state
  • Every tool has a title and correct read-only and destructive hints

Exclusions

  • Approval or placement guarantees
  • New API endpoints
  • New features
  • Hosting fees

Questions

We already have an MCP server. Is this for us?

We audit it, migrate it to 2026-07-28 and fix what blocks listing. That is the Upgrade.

What sets the price?

The number of tools and whether your auth needs changes. The Audit fixes the price before work starts.

Can you guarantee approval?

No. Anthropic, OpenAI and Cursor decide. We build to their published requirements and fix what reviewers flag.

Find out where you stand in five days.

$750. Credited in full to your build.

Book a $750 Audit