An organization should evaluate an MPC wallet as a service by mapping its required signing workflows, control boundaries, integrations, and operational dependencies, then marking each requirement as met, unmet, or unverified. The term “MPC” alone does not establish who controls key material, who can authorize transactions, or what happens when a service is unavailable. Treat those as separate questions to answer from architecture documents, operating procedures, and applicable agreements.
What an MPC wallet as a service evaluation should establish
Start with the organization’s actual use case: what it needs to authorize, which people or systems take part, and which controls must apply. A wallet is used to generate, manage, store, or use asymmetric keys and blockchain addresses. That broad definition does not specify the wallet’s architecture or decide who has authority over its operation. (source )
Likewise, key management is broader than signing. It covers the lifecycle of keying material, including generation, storage, distribution, use, recovery, revocation, and destruction. An evaluation should ask about each relevant stage rather than infer a complete operating model from the “MPC wallet as a service” label. (source )
Keep technical design, organizational governance, and contractual responsibility distinct. A signing design may describe how a transaction is authorized, but the evaluation still needs to establish who initiates and approves actions, who operates each component, and who is responsible for access changes and service continuity. The available evidence here does not define MPC-specific key-share arrangements or determine any provider’s custody status, so those conclusions require service-specific documentation.
Map the wallet workflows and assets the organization needs to support
Translate the intended use into a short workflow inventory before evaluating a service. For each workflow, record the assets and networks involved, the transaction type, the system or person that initiates it, the required approvals, and the expected result. Distinguish normal transactions from exceptions such as a rejected request, a delayed approval, or a change in an authorized operator. These are requirements to verify, not assumed service capabilities.
Separate must-haves from preferences. A requirement might be an approval step before signing, a connection to an internal system, or an auditable record of who approved an action. Mark the evidence needed to verify each item and identify the team responsible for assessing it. Do not treat an integration, asset, network, or policy feature as available unless current service documentation confirms it for the relevant configuration.
Consider operational capacity as well as transaction features. Payment or settlement infrastructure may need sufficient liquid resources in relevant currencies to meet settlement obligations under normal and stressed conditions. This is a general infrastructure requirement, not evidence that a wallet service provides liquidity or manages settlement for a particular organization. (source )
Clarify custody responsibilities, key shares, and control boundaries
Ask the service provider to document the key-management lifecycle in the actual deployment being considered. Find out how keying material is generated, stored, distributed, used, recovered, revoked, and destroyed, and which party performs or oversees each step. The general key-management lifecycle supplies a useful checklist, but it does not establish how any particular MPC system implements those steps. (source )
Then trace authority through a representative transaction. Identify who can create a request, who can approve it, what component produces the authorization, and whether any one person, system, or provider can complete the process alone. Request explanations of relevant administrative access and controls. If documentation does not answer a question, record it as unverified rather than assuming a safeguard exists.
Make responsibility explicit for access changes, personnel departures, service interruptions, and continuity arrangements. Ask what the technical design supports and separately ask what the provider has committed to do. The evidence supplied for this evaluation does not establish provider-specific key shares, unilateral signing restrictions, recovery procedures, continuity commitments, or contractual allocation of responsibility. Those points must be validated against current provider documentation and agreements.
Assess signing controls, integrations, and operational dependencies
Compare documented controls with the workflow inventory. For each approval, authentication, policy, monitoring, or audit requirement, record the evidence that shows how it is implemented and who administers it. Do not mark a control as met based only on a product description or a generic assurance; confirm that it applies to the intended account, workflow, and operating model.
Draw the end-to-end dependency map. Include the wallet service and any internal applications, external systems, operators, or processes that must be available for a transaction to be requested, reviewed, signed, and handled afterward. This map should distinguish dependencies the organization operates from those supplied by a service provider. The evidence available here does not confirm any particular integration or service-continuity arrangement, so each must be checked directly.
For each dependency, document the consequence of delay or failure and the team responsible for the response. Ask what the documented process is when an approval cannot be completed or a connected system is unavailable. Avoid assuming that a signing service also supplies treasury operations, liquidity, compliance tooling, or incident support; those are separate capabilities to verify.
Verify security and governance claims with evidence
Request architecture and security materials that explain the design relevant to the organization’s workflows. Look for clear descriptions of key-management stages, administrative roles, and the boundaries between components. Match each statement to the precise deployment and feature being assessed; a general statement about an architecture is not proof that a specific configuration has the same controls.
Build an evidence register with the claim, supporting document, date or version if stated, reviewer, and any limitation. Record independent assessments, operational controls, and incident procedures only when documentation supports them. If a document is unavailable or does not address a requirement, mark the item unverified and seek an appropriate technical or security review. This process does not itself certify the service or guarantee an outcome.
Use a requirements matrix to compare service models
Use the same criteria for every candidate service or alternative. A practical matrix can include:
| Requirement | Status | Evidence and scope | Owner | Open question |
|---|---|---|---|---|
| Required workflow and transaction types | Met / unmet / unverified | Documentation or review result | Team | What remains to validate? |
| Key-management and administrative boundaries | Met / unmet / unverified | Architecture evidence | Security | Which responsibilities are unclear? |
| Required approvals and controls | Met / unmet / unverified | Workflow-specific evidence | Operations | Does it cover exceptions? |
| Integrations and dependencies | Met / unmet / unverified | Integration documentation | Engineering | What depends on external systems? |
| Continuity and incident handling | Met / unmet / unverified | Documented process or agreement | Operations | What is not specified? |
Treat a requirement as met only when evidence supports it for the relevant workflow and configuration. Keep assumptions visible, and do not compensate for an unresolved critical control with unrelated features. Comparing service models using the same evidence standard keeps the evaluation focused on fit rather than branding.
Set decision gates and plan validation before commitment
Before making a decision, define minimum acceptance criteria and identify who must review the architecture, security controls, workflow, and operating responsibilities. Specify which unresolved questions would block adoption or require a change to the proposed design. This makes a decision gate concrete: it is tied to a requirement and evidence, not a general impression.
Validate important claims through suitable technical, security, and operational review before relying on them. Where the provider documentation is incomplete, seek clarification and preserve the gap in the decision record. Do not infer capabilities or commitments that the reviewed materials do not establish.
Conclude with one of three findings: fit, conditional fit, or insufficient evidence. A conditional fit should name the outstanding conditions, owners, and validation steps. An insufficient-evidence result means the organization cannot yet substantiate the required controls or responsibilities; it is not a judgment about every service using MPC. The useful outcome is a documented decision tied to the organization’s workflows and evidence, with assumptions and open questions still visible.
Sources and references
- Wallet - Glossary — National Institute of Standards and Technology; retrieved 2026-10-18.
- Key Management Guidelines — NIST Computer Security Resource Center; retrieved 2026-10-19.
- Principles for Financial Market Infrastructures — Committee on Payments and Market Infrastructures; retrieved 2026-10-18.