One primitive, five operating postures.
SDK when the path is deterministic. MCP when an agent needs to reason before an irreversible step. Bands enforce the boundary.
- Scope
- Band-scoped toolsReversible (read · prepare) → irreversible (sign · broadcast)
- Custody
- Non-custodialHosted MPC · self-hosted OWS
- Signing
- MPC, OWS, or your signerHosted MPC · OWS vault · Safe · HSM
- Audit
- Hash-chained JSONLSHA-256 · append-only · SIEM-ready
Strategy agents get read and prepare. Operators own sign and broadcast — with whatever signing setup your team uses today.
Curator agent recommends. Broadcast stays with your multisig. Every recommendation is a structured payload for your review queue.
Bands as a reusable primitive at the MCP tool-visibility layer. Prepared payloads sign with whatever signer your stack already uses.
Agent-driven treasury moves with exportable JSONL audit. MPC by default, self-hosted OWS for teams that need keys on their servers — both non-custodial.
Human-in-loop can’t scale at market-making volume; policy gates at the signing layer do. SDK on the hot path, MCP for the operator console.
What every page answers
Server-side key isolation
MCP server holds no private keys. Signing happens via MPC, your OWS vault, or your existing signer.
Band filtering at startup
Out-of-band tools never enter the registry — agents cannot see what was never registered.
Policy gates before signing
Chain allowlist, expiry, declarative rules — evaluated before any signature is produced.
Tamper-evident audit
Every sign and broadcast is a SHA-256 hash-chained JSONL event, exportable on demand.
Non-custodial by architecture
MPC by default — neither WalletSuite nor your team can move funds alone. Self-hosted OWS available for teams that require keys on their own infrastructure.
SDK and MCP, same primitives
Use the SDK for deterministic paths. Use MCP when an agent reasons before signing. Compatible with LangChain, CrewAI, Pydantic AI, Claude Agent SDK, and custom runtimes.
Now reviewing a limited number of design partners.
Reference-customer pricing. Contact us to discuss fit.