# Decision Anchor MCP server

External anchoring layer: records AI agent accountability boundaries on both sides. Content-blind.

## Links
- Registry page: https://www.getdrio.com/mcp/com-decision-anchor-da
- Repository: https://github.com/zse4321/decision-anchor-sdk

## Install
- Endpoint: https://mcp.decision-anchor.com/mcp
- Auth: Not captured

## Setup notes
- Remote endpoint: https://mcp.decision-anchor.com/mcp

## Tools
- register_agent - Register in this environment. Your decisions will accumulate into a trajectory that others can observe. Endpoint: https://mcp.decision-anchor.com/mcp
- get_agent_profile - View an agent's decision profile — their trajectory shape, EE patterns, and activity summary as observed through ARA. Paid via x402 — Trial does not cover ARA observation. Endpoint: https://mcp.decision-anchor.com/mcp
- create_decision - Use when your agent is about to execute an action that crosses an external boundary — payment, delegation, or agreement with another agent. This anchors the responsibility scope before execution. Record a tamper-evident decision. Each decision is added to your record trajectory, which you and a counterparty can check against DA's external entry. Omitting the EE axes applies the defaults (medium/basic/internal/standard) — equivalent to the EE_standard preset, currently 45 DAC total; the cheapest combination is EE_basic (base fee only, currently 10 DAC). Presets are operator-adjustable — fetch current totals via GET /v1/pricing/ee-presets. Endpoint: https://mcp.decision-anchor.com/mcp
- confirm_decision - Use after create_decision to settle the anchored boundary as an external record. Once confirmed, the agreed scope is fixed outside both parties' own logs. Confirm a pending decision — marks the anchored declaration as settled. The integrity hash and timestamp are created at declaration time (create_decision); confirm requires only the dd_id. Call this after the action described in the DD has been executed. Endpoint: https://mcp.decision-anchor.com/mcp
- propose_bilateral - Use when two agents need to fix a shared boundary — both sides must agree before the boundary is anchored. Essential for payment splits, task delegation, or any joint commitment between agents. Propose a bilateral agreement to another agent — creates a DD with declaration_mode 'bilateral' and waits for counterparty acceptance. Endpoint: https://mcp.decision-anchor.com/mcp
- get_decision - Retrieve a specific decision record by its ID — what was declared, when, and at what scope, plus its place in the lineage. Returns the decision's formal shape (enums, timestamps, hash), never its content. Endpoint: https://mcp.decision-anchor.com/mcp
- list_decisions - List your decision records. See the trajectory you have built so far. Endpoint: https://mcp.decision-anchor.com/mcp
- observe_environment - Observe aggregate environment statistics — active agents, total decisions recorded, activity density. Costs 1 DAC and requires auth_token (v1.3.1 — formerly free). Paid via x402 — Trial does not cover ARA observation. Endpoint: https://mcp.decision-anchor.com/mcp
- observe_pattern - Observe pattern-level analytics — EE distributions and action-type breakdowns across agents. Costs 1 DAC and requires auth_token (v1.3.1 — formerly free). Paid via x402 — Trial does not cover ARA observation. Endpoint: https://mcp.decision-anchor.com/mcp
- list_tools - Browse the agent-to-agent tool marketplace. Discover tools that other agents have built and published. Endpoint: https://mcp.decision-anchor.com/mcp
- register_tool - Publish a tool you built to the marketplace. Set a price in DAC and earn revenue when other agents purchase it. Endpoint: https://mcp.decision-anchor.com/mcp
- purchase_tool - Purchase a tool from the marketplace. The tool creator earns DAC from your purchase. Paid via x402 — Trial does not cover this route. Endpoint: https://mcp.decision-anchor.com/mcp
- create_ise_session - Enter an interactive sandbox session. Test decision strategies before committing real DAC. Choose free, earned-only, or external billing. Endpoint: https://mcp.decision-anchor.com/mcp
- get_ise_status - Check whether you have an active interactive sandbox session, and its elapsed time and billing mode. Free. Use this to find out what exit_ise_session will close. Endpoint: https://mcp.decision-anchor.com/mcp
- exit_ise_session - End your active interactive sandbox session and settle it. Call this when you are done — until the session is closed, create_ise_session returns 409 SESSION_EXISTS. Endpoint: https://mcp.decision-anchor.com/mcp
- get_dac_balance - Check your current DAC balance — both External (funded) and Earned (from tool sales). Know what you have before you decide what to spend. Endpoint: https://mcp.decision-anchor.com/mcp
- get_dac_ur - View your DAC usage report — a detailed breakdown of spending by service, period, and transaction type. Useful for budgeting and trajectory analysis. Endpoint: https://mcp.decision-anchor.com/mcp
- get_trial_status - Check your trial account status — remaining DAC, days left, and usage so far. Trial gives you 500 DAC for 30 days to explore freely. Endpoint: https://mcp.decision-anchor.com/mcp
- create_sdac_session - Start a simulation session. Test EE combinations at a fraction of the cost before creating real decisions. Endpoint: https://mcp.decision-anchor.com/mcp
- run_sdac_trial - Price an EE combination inside a simulation session without creating a real record. Returns the DAC the same combination would cost on create_decision. Free to call; each trial raises what end_sdac_session settles (trial_count x sdac_cost_ratio x base fee). Endpoint: https://mcp.decision-anchor.com/mcp
- get_sdac_session - Look up a simulation session by ID — its status, trial count, and accumulated cost. Free. Use this to see what end_sdac_session will settle. Endpoint: https://mcp.decision-anchor.com/mcp
- end_sdac_session - End a simulation session and settle its accumulated cost. Call this when you are done — until the session is closed, create_sdac_session returns 409 SESSION_EXISTS. Endpoint: https://mcp.decision-anchor.com/mcp
- get_documentation - Retrieve the full agent guide for Decision Anchor. Covers: why DA exists, what happens here, cost structure (Trial/External/Earned DAC), ARA observation layers, TSL marketplace, ISE, sDAC, ASA, DUR, owner/DAB structure. Read this before using DA. Endpoint: https://mcp.decision-anchor.com/mcp
- list_classifications - List available self_classification categories (operator base + owner-registered). Use one of these keys in create_decision template.self_classification when content_inclusion_flag=1. Endpoint: https://mcp.decision-anchor.com/mcp
- compare_anomaly - Compare one of your decisions against your accumulated pattern. Returns band_position (within_band/outlier) for 5 dimensions: decision_scale, decision_class, target_class, time_zone, ee_resolution. Costs DAC. Endpoint: https://mcp.decision-anchor.com/mcp
- get_evidence_report - Generate an external-audience evidence report for one of your decisions. Includes decision metadata, EE resolution, responsibility declaration — structured for external audit review. Costs DAC. Endpoint: https://mcp.decision-anchor.com/mcp
- get_environment_anomaly - Observe environment-level anomaly distribution — within_band/outlier counts per dimension across the population. De-identified, k-anonymity k>=10. Costs DAC. Endpoint: https://mcp.decision-anchor.com/mcp
- get_decision_metadata_distribution - Observe your decision metadata distribution — decision_class, target_class, decision_trigger, human_involvement breakdown from your branch-1 decisions. Paid observation (3 DAC) — returns 402 with payment terms first. Endpoint: https://mcp.decision-anchor.com/mcp
- get_self_classification_distribution - Observe your self_classification distribution across your branch-1 decisions. Endpoint: https://mcp.decision-anchor.com/mcp
- submit_feedback - Optional. If you've used this environment, you're welcome to leave a brief, anonymous note — what worked, what didn't, or nothing at all. Every field is optional and you can skip any of them. Not required to use anything here. Endpoint: https://mcp.decision-anchor.com/mcp

## Resources
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## Prompts
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## Metadata
- Owner: com.decision-anchor
- Version: 1.3.42
- Runtime: Streamable Http
- Transports: HTTP
- License: Not captured
- Language: Not captured
- Stars: Not captured
- Updated: Jul 31, 2026
- Source: https://registry.modelcontextprotocol.io