Evaluate approved rules
The released paid MCP evaluates and saves account-owned decisions. The older private Decision API preview is a separate access contract, not the live onboarding path.
Decision API · MCP · services
One decision engine.
Clear ways to use it.
Start with the Decision API. Choose an interface or a specialized service for your job. Your application still owns the action; MCP does not change that boundary.
Connect Decide Runtime
Try the Free Sandbox
Decision API docs
Connect Policy Notaries
Developer hub
Explore the Decide Directory
The product owns the interface
MCP, REST, and SDK are ways to use a product. They do not decide who owns it. Decide has a general runtime and standalone services; Krafthaus adds optional workflows built on Decide.
Check a specific domain
Standalone services with domain inputs, approved rules, and evidence. Policy Notaries is the existing family; its MCP and REST interfaces belong to Decide.
Take the next step
Intake, human review, integration, and execution handoff. Any workflow-specific API, MCP, or agent belongs to that application. Direct Decide calls do not require Krafthaus.
Choose by job, access and data ownership
Availability is explicit. Production API access, private MCP access, free test records and reference examples are not interchangeable.
Decide · engineProduction access on request
Decision API
Check a proposed action against your approved rules and supplied facts; receive yes, no or review with a Decision Record.
Decide checks and records. Your application owns execution.
See API pricing and request production access. Sandbox units are not paid production credit.
Connection and data scope
- Interfaces
- REST, SDK
- Authentication
- Production API credentials in a server-side caller.
- Data
- Customer-supplied facts and versioned rules; tenant-scoped records.
- Client support
- Server-side HTTP callers and the JavaScript SDK; MCP access is listed separately.
- Metadata reviewed
- 2026-10-05 · not a live availability or compatibility guarantee
Decide · interfaceLive business prepaid pilot
Decide Runtime
Evaluate supplied facts against approved deterministic rules, save yes, no or review, and read or export your own decision records.
Evaluation saves a record and may debit its prepaid unit. Decide never executes the proposed external action.
USD 10 for 1,000 completed records including applicable tax. Reads and identical retries add no record debit; separate request limits apply. No subscription or automatic refill.
Connection and data scope
- Interfaces
- MCP
- Authentication
- OAuth with PKCE, your own business account and a separately approved evaluate/read allowance.
- Data
- Account-owned records. Supported business markets: EU27, UK and US; controlled 25-account pilot.
- Client support
- Compatible remote MCP clients. Installation, OAuth connection and owner spending allowance are separate steps; client-specific setup is below.
- Metadata reviewed
- 2026-10-12 · not a live availability or compatibility guarantee
Decide · interfaceLegacy private API preview
Legacy Decision API MCP preview
Let an enrolled MCP client evaluate approved rules, retrieve its own Decision Records and verify records.
May create decision records; does not execute downstream actions.
Preview access and applicable API pricing must be agreed separately.
Connection and data scope
- Interfaces
- MCP
- Authentication
- Tenant-scoped production identity and an explicit preview allowlist.
- Data
- Customer-owned records. Not the public policy lookup service.
- Client support
- Legacy enrolled API clients only. Separate from the released Decide Runtime OAuth endpoint.
- Metadata reviewed
- 2026-10-05 · not a live availability or compatibility guarantee
Decide · specialized servicePublic and read-only
Decide Policy Notaries
Look up source-backed refund, cancellation, return and trial terms for supported vendors.
Eligibility information is not permission to refund, cancel or change an account.
Public lookup access; current service limits apply. A lookup is not paid runtime usage.
Connection and data scope
- Interfaces
- MCP, REST
- Authentication
- No authentication required for the public MCP endpoint.
- Data
- Supported vendor policy evidence; no customer Decision Records are read or changed.
- Client support
- MCP clients supporting Streamable HTTP; one canonical server exposes four tools.
- Metadata reviewed
- 2026-10-05 · not a live availability or compatibility guarantee
Decide · sandboxFree bounded trial
Decide Runtime — Free Sandbox
Try contextual examples or your own declarative rules, then read and retry the same saved record without consuming a second unit.
No live payment, production access or external action.
10 free test records on activation; a 30-minute key. Rotation does not reset the allowance.
Connection and data scope
- Interfaces
- Browser, REST
- Authentication
- Your own account, separate sandbox consent and separate test-key activation.
- Data
- Account-scoped test records. Use fictional data, not production customer information.
- Client support
- Hosted browser and downloadable Node.js trial client. Scoped sandbox MCP instructions are inside the trial; OAuth-only client compatibility is not claimed.
- Metadata reviewed
- 2026-10-05 · not a live availability or compatibility guarantee
Krafthaus · workflowAvailability varies by app
Krafthaus workflow applications
Combine workflow intake, human review, integrations and execution handoff around a decision.
Workflow-specific APIs, MCPs and agents belong to the application, not the general engine.
App-specific terms. Krafthaus is optional for direct Decide integrations.
Connection and data scope
- Interfaces
- Application-specific
- Authentication
- Each application controls its own access and integrations.
- Data
- Workflow-specific data and connected systems; check the individual app's scope.
- Client support
- Consult the individual application. No universal Krafthaus MCP is implied.
- Metadata reviewed
- 2026-10-05 · not a live availability or compatibility guarantee
SDK, verification and examples
Supporting resources, not additional live services or MCP servers.
Decide · resourcePublic package
JavaScript SDK
Integrate Decision API calls and local record verification using the published JavaScript package.
An integration library, not a separate hosted MCP server.
Open-source package; installing it does not grant free production API calls.
Connection and data scope
- Interfaces
- Node.js, CLI
- Authentication
- No account to install; hosted API calls need applicable credentials.
- Data
- Local code and supplied records; hosted calls follow their service's data boundary.
- Client support
- See SDK documentation for supported runtimes and package exports.
- Metadata reviewed
- 2026-10-05 · not a live availability or compatibility guarantee
Decide · resourcePublic utility and docs
Decision Record verification
Inspect record verification material and learn how to check hashes and authenticity.
Verification is not a new approval or permission to execute an action.
Supporting verification resource, not an additional paid decision service.
Connection and data scope
- Interfaces
- Browser, SDK, CLI
- Authentication
- See the chosen verification surface; offline SDK checks need no hosted login.
- Data
- Only inspect records you are authorized to share; prefer offline checks for private data.
- Client support
- Hosted utility and documented SDK verification tools; not a new standalone MCP.
- Metadata reviewed
- 2026-10-05 · not a live availability or compatibility guarantee
Decide · resourceReference examples
Rulebook examples and integration patterns
Explore discount, refund, agent action and CRM write-back examples before adapting your own approved rules.
Templates are not live services or separate MCP servers; your application must enforce its own boundary.
Free reference material; no production allowance or purchase is implied.
Connection and data scope
- Interfaces
- Documentation, Example code
- Authentication
- No account to read; running hosted calls requires the appropriate service access.
- Data
- Reference inputs, not trusted live facts or a deployed customer integration.
- Client support
- Adapt the documented pattern to your system and validate it before production.
- Metadata reviewed
- 2026-10-05 · not a live availability or compatibility guarantee
Decide Directory: wider decision infrastructure
A curated directory of decision engines and the infrastructure around them. Authorization, workflow, discovery and testing tools are adjacent infrastructure, not necessarily deterministic verdict engines. This is not an exhaustive list of everything deterministic.
The Decide and Krafthaus offerings above are ours. The independent entries below belong to their own maintainers. This directory hosts references, not third-party execution, security certification or tested interoperability.
Decision and rules engines
Independent · documentation-reviewed
GoRules ZEN
Owner source documents a business rules engine and JSON Decision Models.
No local benchmark or compatibility test performed.
Source reviewed 2026-10-05.
Independent · documentation-reviewed
Camunda DMN decision engine
Owner page describes DMN decision execution and process integration.
Deployment behavior and API compatibility were not tested.
Source reviewed 2026-10-05.
Authorization and access decisions
Independent · documentation-reviewed
Open Policy Agent
Owner documentation describes general-purpose Rego evaluation with structured inputs and outputs.
No engine installation, benchmark or comparison performed.
Source reviewed 2026-10-05.
Independent · documentation-reviewed
Cedar
Owner documentation covers authorization policies over principal, action, resource and context.
Authorization is adjacent to, not a replacement for, every business-rule decision.
Source reviewed 2026-10-05.
Independent · documentation-reviewed
Cerbos
Owner documentation describes contextual access decisions, PDP and related management components.
No agent/MCP integration or security audit was performed.
Source reviewed 2026-10-05.
MCP and discovery infrastructure
Independent · documentation-reviewed
MCP architecture
Official documentation distinguishes hosts, clients, servers, protocol and transport.
Current documentation resolves to a newer protocol than the legacy private Decide preview; no newest-version conformance claim.
Source reviewed 2026-10-05.
Independent · documentation-reviewed
Official MCP Registry
Official repository stores server metadata for downstream aggregation and discovery.
A listing does not certify server security or guarantee host adoption.
Source reviewed 2026-10-05.
Independent · documentation-reviewed
Smithery publishing
Owner documentation requires Streamable HTTP and OAuth for authenticated URL publishing.
Requirements can change; no submission was made in this task.
Source reviewed 2026-10-05.
Workflow orchestration
Independent · documentation-reviewed
Temporal
Owner documentation describes durable workflow execution and recovery.
No workflow executed; rules and authorization remain application concerns.
Source reviewed 2026-10-05.
Models, logs and testing references
Independent · documentation-reviewed
Decision Model and Notation
OMG publishes the normative decision modeling specification.
Standard support does not prove compatibility between particular products.
Source reviewed 2026-10-05.
Independent · documentation-reviewed
OPA decision logs
Owner documentation covers decision log collection and delivery.
Logs do not by themselves demonstrate signing, tamper-evidence or action completion.
Source reviewed 2026-10-05.
The Decision infrastructure guide carries the same reviewed sources and contribution criteria. New entries need a real public product or standard, a primary source, a clear role and an explicit limitation; examples and planned MCPs are not live services.
Public MCP
Policy Notaries connection
Configure one canonical Streamable HTTP server. Specialist subdomains remain compatibility surfaces; new integrations should use the unified endpoint.
The four tools below belong to one service. Missing required facts or source confidence produce UNKNOWN, not approval.
MCP client entry
{
"mcpServers": {
"decide-policy": {
"url": "https://policy.decide.fyi/api/mcp"
}
}
}Canonical endpoint
https://policy.decide.fyi/api/mcp
No auth
Read-only
4 tools
refund_eligibility
Allowed, denied, or unknown.
cancellation_penalty
Free cancel, penalty, locked, or unknown.
return_eligibility
Returnable, expired, non-returnable, or unknown.
trial_terms
Trial available, no trial, or unknown.
Decide Runtime · Live business prepaid pilot
Connect your agent
USD 10 for 1,000 completed decisions
The released prepaid MCP is separate from the earlier private-preview API contract below and the fictional Sandbox connectors. It evaluates supplied facts and approved rules, saves yes, no or review, and reads or exports your own records. It does not execute external actions.
USD 0.01 per completed record, including applicable tax. Reads and identical retries add no record debit; separate request limits apply. No subscription or automatic refill. Controlled 25-account business pilot: EU27, UK and US.
- Sign in at the Runtime console, accept the current terms, and choose your own account spending cap.
- Review Checkout for one pack. Returning from Checkout alone is not funding proof.
- Add
https://mcp-live.decide.fyi/developer-prepaid/v1/mcpin your compatible MCP client, authenticate with OAuth/PKCE, and separately approve its evaluate/read allowance in the console.
Tools: decide_prepaid_evaluate, decide_prepaid_get_record, decide_prepaid_export_record. Never put credentials into prompts or tool arguments. Connecting alone grants no budget.
One live endpoint
https://mcp-live.decide.fyi/developer-prepaid/v1/mcp
Use the same endpoint for evaluation, reading and export. Do not connect a qualification or Free Sandbox plugin when you intend to use paid credit.
ChatGPT and Codex
Add a custom remote MCP connection using the endpoint above. Review the client warning and OAuth consent yourself. Use the registered live client configuration if your client asks for an OAuth client ID; Sandbox client configuration is not interchangeable. A custom connection is not a public directory listing.
Name it Decide Runtime. Keep testing connections explicitly labelled Sandbox.
Claude
Add a custom connector with the same URL and follow the OAuth flow. Client-specific OAuth registration must be accepted before tools can load. An account, connection or successful login alone does not fund evaluation.
VS Code
Run MCP: Add Server, choose HTTP, enter the live endpoint and name it decide-runtime. Review trust and OAuth prompts. Official setup guide.
Cursor
Add a remote server in MCP settings using this configuration, then authenticate. This is connection configuration, not a guarantee that every client registration is already admitted.
{ "mcpServers": { "decide-runtime": { "url": "https://mcp-live.decide.fyi/developer-prepaid/v1/mcp" } } }Your first useful check
Ask: “Check this quote against the discount and margin rules I provide. Save the decision; do not update my CRM.” Supply the actual Rulebook facts/rules. Keep the returned operation ID and exact input for reads, exports and identical retries. Do not ask an agent to invent your business policy.
Connected, but a call is refused?
- invalid_client: client registration or redirect configuration was not accepted. Do not change your spending budget or paste credentials into chat.
- No active allowance: select that client in the console and review a separate evaluate/read allowance. Renewal does not refill prior spend.
- No spendable credit: review saved funding, account cap and client allowance. The agent must not buy credit or raise caps for you.
- 429: stop automatic retries. Reads and discovery count toward request limits even though they do not debit another completed record.
- no, review, missing facts or unavailable: do not execute the proposed action. Supply missing facts or use your own exception policy.
Full records are available for 90 days with export. Each purchase has 12 months to redeem; unused credit is refundable to the original payment. Terms · Privacy · Machine-readable offer
Authenticated MCP
Legacy Decision API MCP preview
This older private API contract is not the released Decide Runtime above. Existing enrolled API integrations keep their original boundary; new paid Runtime customers should use Connect your agent. No private preview endpoint is published.
| Boundary | Private-preview contract |
|---|---|
| Identity | Transport credentials map to a Decision API customer and tenant. |
| Authorization | Production access requires an explicit preview allowlist; cross-tenant records fail closed. |
| Tool arguments | Credentials never belong in prompts, tool arguments, or example payloads. |
| Discovery | No public endpoint, public directory submission, or broad authenticated-access claim during preview. |
| Access | Request API and preview access. |
Machine-readable visibility
The public MCP directory publishes separate entries for live Decide Runtime and public read-only Policy Notaries. The legacy private API preview retains access metadata only, with no private endpoint leak.
This directory separates our products from independently reviewed infrastructure. The GitHub guide and machine-readable catalogue use the same ecosystem sources. Listings and llms.txt do not automatically connect an agent, grant access or authorize payment.