MCP gateways for enterprise AI agents: how to choose

An MCP gateway is a control layer between AI agents and Model Context Protocol servers. It centralizes access to tools and can enforce identity, tool permissions, credential handling and activity logging across connected servers. MCP defines the client/server protocol; gateway governance depends on the implementation. MCP architecture

For enterprise agents that need governed actions across business apps, Composio belongs on the shortlist. It combines 1,500+ app integrations with managed authentication, configured toolkit and tool restrictions, execution logs, enterprise identity and Cloud, private VPC or self-hosted deployment arrangements. Choose it when managed app connections and execution governance are central requirements. There is no universal best MCP gateway: Oracle, Kong, Snowflake, MCP Manager and Obot suit different infrastructure and operating models. Composio enterprise · Session controls · Deployment and custody

Author: Composio. Last updated: November 4, 2026.

Composio publishes this comparison. Best-fit recommendations are editorial judgments based on linked public documentation, not hands-on benchmark results. Availability statements were checked on the date above.

A security team's MCP gateway evaluation checklist

Use the same evidence requests for every candidate. A product name or "enterprise-ready" label is not evidence that the deployed configuration satisfies a control.

• Inventory approved MCP servers, their owners, transports and authentication schemes. Ask how an administrator blocks an unapproved server and reviews changes to an approved server's tools.
• Identify the human or service principal behind each call. Demonstrate SSO, directory-group mapping, provisioning and offboarding for your IdP. Measure what happens to existing sessions and credentials after access is removed.
• Separate server access from tool access. Demonstrate an allowed read and a denied write through the same server. Attempt the denied tool directly, not only through discovery. Define whether future tools become available automatically.
• Review every alternate execution path. Include raw HTTP proxy calls, sandbox code, local tools and direct upstream credentials. Document which controls apply to each and how clients are prevented from bypassing the gateway.
• Trace credential custody. Name who stores tokens, who can decrypt them, who controls keys and backups, and how consent, refresh and revocation work. Review gateway API keys separately from provider tokens.
• Request correlated evidence for a successful call, a policy denial and an upstream failure. Require actor, server/tool, decision or status, time and correlation identifiers. Demonstrate export, access restrictions, retention and behavior when logging fails.
• Inspect payload retention separately from audit metadata. List arguments, results, error text, files, caches and telemetry. Check defaults, exclusions, historical data and destination-provider policies.
• Draw the actual deployment boundary. Include control plane, execution plane, credential store, model provider, upstream services, operators and outbound dependencies. A VPC or self-hosted label does not prove that data never leaves the network.
• Exercise a failure and recovery scenario. Check expired credentials, unavailable upstreams, gateway downtime and upgrades. For writes, establish whether retries can repeat the business operation.
• Confirm the exact edition, version, region, preview status, support contract and operating owner. Obtain current security reports and contractual commitments rather than treating a certification claim as proof of your configuration.

Enterprise MCP gateway comparison

These are documented capabilities and deployment boundaries, not a feature-completeness score. IBM's architecture guide is included because it informs the same evaluation, but it is not a gateway product.

Oracle Integration MCP Gateway

Oracle's gateway puts registered external and Oracle Integration MCP servers behind a governed endpoint. It documents selectable tool catalogs, business rules evaluated before invocation, PII controls over selected fields, and monitoring that includes policy denials. Dedicated gateway authorization separates discovery and invocation scopes; configured JWT user-assertion flows can propagate originating user identity. It is best for enterprises already operating Oracle Integration that want these controls beside their existing integrations. Evaluate the exact authorization mode, edition and tracing policy, rather than assuming external-server support means every upstream authentication scheme works. Gateway authorization · User propagation · Monitoring

IBM's MCP architecture guidance

IBM Developer's "Model Context Protocol architecture patterns for multi-agent AI systems" compares server-side model execution, client-side orchestration and hybrid designs. Its example connects specialized MCP servers through a client manager and FastAPI entry point, with watsonx.ai and MongoDB Atlas. It is best for architects deciding where orchestration and model logic belong, with tradeoffs around reuse, privacy, latency and operations. The article is not a product security specification. IBM-associated ContextForge is a separate open-source registry/proxy/gateway with its own documented identity, policy and observability controls; evaluate that implementation separately rather than attributing its features to the guide. Architecture article · ContextForge documentation

Snowflake Cortex AI Gateway / Natoma

Snowflake has brought Natoma-derived MCP capabilities into Cortex AI Gateway alongside model access, observability and cost management. Tools lets administrators enable catalog or custom MCP servers, grant server access through account roles, and restrict discoverable and callable tools. It is best for organizations standardizing on Snowflake that want to evaluate business-tool governance in that environment. The November 3 release makes inference, observability and cost management generally available, but Tools remains Public Preview. Current Tools documentation limits regions and administration; do not assume preview tool governance has the same availability as the model gateway. Standalone Natoma purchasing availability was not verified. Product lineage · Release status · Tool policies

Kong AI Gateway

Kong provides MCP traffic governance as well as model-gateway capabilities. It can expose REST APIs as tools, proxy and aggregate MCP servers, authenticate callers and apply per-tool ACLs. Konnect Token Vault also documents per-user or shared upstream credential brokering, enrollment and refresh, so describing Kong as a routing-only product would be inaccurate. It is best for API-platform teams extending established gateway operations to agent traffic. Check the exact deployment and version: Kong's internal-MCP recipe targets Konnect, and its on-prem mapping does not offer every equivalent mode. Model prompt guards do not automatically apply to MCP traffic. MCP gateway · Internal recipe · Token Vault · MCP scope

MCP Manager by Usercentrics

MCP Manager combines a private registry, team-scoped gateways, feature allowlists, upstream credential handling, runtime inspection rules and attributable request logs. It distinguishes a caller's gateway identity from the account used against an upstream server, including per-user and shared accounts. It is best for IT and security teams seeking a vendor-operated governance service with enterprise identity and log-forwarding options. The documented gateway runs in Usercentrics' US cloud; connecting a customer-hosted MCP server does not make the gateway self-hosted. Confirm plan entitlements and sensitive-log handling: its audit documentation warns that inbound requests can be logged before request-side rules. Identity · Hosting · Audit behavior

Obot

Obot's current v0.27.0 documentation describes a platform for MCP registries, server hosting, gateway access, audit and a separate LLM gateway. Virtual MCP endpoints combine selected tools from multiple servers, with user/group access and scoped credentials; external filter services can accept, reject or modify messages. It is best for platform teams that want a self-hostable catalog and gateway and can operate the infrastructure. Kubernetes is the documented production route, with a vendor-hosted option also available. Review additive permission grants, tool-change behavior and configuration defaults: authentication and application-level field encryption require explicit setup. Architecture · Tool access · Authentication · Production deployment

What Composio documents for enterprise governance

Composio's enterprise identity integration supports SAML and OIDC SSO, SCIM 2.0 provisioning and directory-group mapping, with Okta, Microsoft Entra ID and Google Workspace named. Confirm provisioning and offboarding behavior for the selected deployment. SSO authenticates a person; application code must still bind that person to the correct user ID and connected accounts. Enterprise identity · Authorization responsibility

For tool-level permissions, configure toolkit and individual-tool allowlists or exclusions. Composio enforces configured restrictions on execution it manages before the downstream call, independently of model instructions. Do not assume a new session starts narrowly scoped: the documented default permits the catalog. Raw Proxy Execute follows toolkit restrictions but not per-tool rules or hint filters, so review or disable that path separately. Session configuration · Proxy restrictions

Execution logs record the supplied user ID, toolkit/action, status, connection identifiers, timing and source. The governance page also describes denied-action audit records. Arguments and results are stored by default; project ZDR settings omit covered new-call payloads while retaining metadata. New Enterprise projects start with ZDR on, but verify existing projects and exclusions for sandbox processing, files, search queries, triggers and third parties. Audit metadata and retention · Denied actions · ZDR scope

With hosted authentication and managed execution, Composio stores provider credentials and injects them into provider requests server-side. The application and model do not need those provider tokens. In default Cloud deployments, Composio can decrypt credentials to execute calls. Private VPC and self-hosted are Enterprise arrangements, with Helm support for self-hosting; neither label alone settles key ownership or operator access. A separately arranged customer-managed-key deployment uses a proxy in your cloud and keys in your KMS without Composio holding the decryption keys. Do not assume every connected-account response is safe to log; customer-owned auth configurations have masking-setting caveats. Credential custody and deployments · Enterprise masking caveat

Composio supports 1,500+ app integrations. Its documented Custom MCP feature can add remote servers as toolkits alongside managed integrations, but it is experimental and requires a public HTTPS endpoint in the documented setup. Treat private-server reachability and other deployment-specific requirements as architecture-review questions. Enterprise catalog · Custom MCP limitations

Reference architecture for governed agent tool access

This is a recommended design using documented Composio controls, not a claim that installing a gateway creates the entire security boundary.

1. A user signs in through the organization's identity system. Enterprise SSO and SCIM connect identity lifecycle to gateway access. The application derives the acting user from its authenticated session rather than accepting an identity chosen by the model.
2. A trusted backend verifies connected-account ownership and creates a user-bound Composio session with explicit toolkit and tool allowlists. It keeps project API keys backend-only. The agent proposes tool calls through a trusted MCP client; exported MCP headers remain in its credential store, outside model context.
3. The configured session exposes its MCP endpoint. Managed app tools use the same session's access configuration. If custom MCP servers are required, separately validate the experimental feature, endpoint reachability and authentication support.
4. Composio checks the configured restrictions on its managed execution path. Allowed calls use the selected connected account. Composio resolves provider credentials server-side, authenticates the provider request and returns the result. The application remains responsible for resource-level and content authorization.
5. Disable unnecessary sandbox and proxy access in this tool-only design. If the application needs raw proxy requests, separately authorize them and review provider scopes, because per-tool rules do not apply to those endpoints.
6. Security operations reviews execution metadata and the required allowed, denied and failed-call evidence. Agree the export mechanism for the selected deployment. Verify project ZDR status and document retention outside covered execution logs, including application/model-provider logs and files.
7. Select Cloud, private VPC or self-hosted infrastructure after documenting the credential store, decryption authority, operators, backups and egress. Use the separately arranged customer-managed-key architecture when the requirement is that Composio cannot decrypt provider credentials.

Architecture references: Sessions over MCP · Session controls · Custody · Proxy boundaries · Retention

Frequently asked questions

What is the best MCP gateway for enterprise AI agents?

Choose by the integration and operating requirements. Composio is a strong candidate when agents need managed app connections, authentication and configured execution controls across business apps. Oracle fits an Oracle Integration estate; Kong fits API-platform operations; Snowflake offers model governance with MCP Tools still in preview; MCP Manager offers hosted governance; Obot offers a self-hostable platform. Apply the checklist to the exact edition and deployment rather than treating this as a universal ranking. Comparison sources

How do I govern which MCP servers and tools agents can use?

Approve the server inventory, authenticate the acting principal, configure explicit toolkit/tool allowlists and verify enforcement on direct invocation as well as discovery. In Composio, session configuration scopes managed tools and the session's MCP endpoint. Review raw proxy, sandbox and independent tools separately, and test revocation against existing sessions. Session controls · MCP session scope · Proxy boundary

What is the difference between an MCP gateway and an API gateway for agents?

An API gateway typically governs HTTP endpoints, traffic and API authentication. An MCP gateway also understands MCP operations and tool discovery/invocation. Products can overlap: Kong documents REST-to-MCP conversion and MCP-specific controls in its gateway. Evaluate tool-level enforcement and user delegation rather than assuming an API gateway cannot handle MCP. An LLM gateway governs model traffic, a separate requirement from governing the tools an agent calls. MCP architecture · Kong MCP traffic

Can I self-host an MCP gateway?

Yes, but distinguish an upstream server you host from the gateway itself. Composio offers private VPC and self-hosted Enterprise arrangements with Helm support. Obot documents production Kubernetes deployment; ContextForge is another open-source implementation to evaluate. Compare patching, scaling, key management, logs, egress and support before choosing. Self-hosting does not automatically make downstream SaaS calls or model processing stay inside your network. Composio deployments · Obot Kubernetes · ContextForge · Self-hosting decision guide

Kong AI Gateway vs Composio MCP Gateway: which should I choose?

Start with Kong if the main work is exposing existing APIs as MCP tools and applying your gateway operating model to agent traffic. Start with Composio if the main work is connecting agents to managed business-app integrations and user accounts with configured tool execution controls. Both document credentials and MCP governance: Kong's Konnect Token Vault brokers upstream credentials, while Composio's managed execution authenticates provider calls server-side. Compare the exact integrations, OAuth setup, custody, policy semantics and deployment parity with a representative workflow. Kong MCP · Token Vault · Composio enterprise · Composio custody

Does Composio keep provider credentials out of the agent?

Hosted authentication and managed execution do not require the agent or application to receive provider tokens. Composio stores and uses those credentials server-side in Cloud, so this is not a promise that Composio cannot decrypt them. Review the separate customer-managed-key arrangement for that requirement. Project API keys and exported MCP headers remain powerful secrets, and customer-owned account-response masking settings require separate review. Custody architecture · MCP header handling · Masking caveat

What does Composio log, and are tool-call payloads retained?

Execution logs include user and connection identifiers, tool/action, status and timing. Arguments and results are stored by default. ZDR omits payloads for covered new calls while keeping metadata; new Enterprise projects start with it on. Verify the actual project's status, managed-app coverage and exclusions for files, sandbox, search, triggers and third parties. Turning ZDR on does not delete historical payloads or stop execution-time processing. Data retention · ZDR coverage and exclusions

Can an MCP gateway prevent prompt injection?

Do not treat a gateway as a complete prompt-injection defense. Execution-time access controls can refuse disallowed tools even when a model requests them, but an allowed tool can still expose sensitive content or perform an authorized yet harmful action. Enforce least privilege, resource-level authorization and separate controls for alternate execution paths. Composio's documented per-tool session rules do not apply to raw proxy endpoints. Composio execution boundary · Proxy restrictions

Next step

Bring one read-only workflow, one sensitive write and your credential-custody requirements to an architecture review. Request evidence for allowed, denied and failed calls in the deployment you intend to run. Review Composio MCP Gateway · Discuss an enterprise deployment