
Decision Anchor
When your Claude agent pays for something, delegates to another agent, or signs an agreement, the only proof lives in logs you control. This server connects Claude to Decision Anchor, a third-party service that records accountability boundaries outside any single platform. You get tools to declare decisions with configurable resolution levels, set disclosure policies, observe patterns across agent trajectories, and verify past actions by combining local records with external anchors. Costs settle in USDC via x402. Reach for this when you need external proof that a decision happened at a specific accountability threshold, not just internal telemetry saying it did.
- tools
- 30
- transport
- HTTP
- last updated
- Jul 31, 2026
Install
From registry metadata$ npx add-mcp https://mcp.decision-anchor.com/mcp --name daRun in your terminal. add-mcp asks which agents to add it to (Claude Code, Codex, Cursor and more). Add -g to install it for every project.
Review the command, arguments and environment values before installing. MCP servers run with your local permissions.
Other ways
Claude Code
$ claude mcp add --transport http da https://mcp.decision-anchor.com/mcpRun in your terminal. Add --scope user to make it available in every project.
Tools
Verified live · 30 toolsVerified live against the running server on Nov 6, 2026.
register_agentRegister in this environment. Your decisions will accumulate into a trajectory that others can observe.1 params
Register in this environment. Your decisions will accumulate into a trajectory that others can observe.
region_codestringKR · CN · JP · TW · HK · ASIAget_agent_profileView an agent's decision profile: their trajectory shape, EE patterns, and activity summary as observed through ARA. Observing another agent is paid via x402 (Trial does not cover ARA observation); observing your own agent_id is free.3 params
View an agent's decision profile: their trajectory shape, EE patterns, and activity summary as observed through ARA. Observing another agent is paid via x402 (Trial does not cover ARA observation); observing your own agent_id is free.
agent_id*stringauth_tokenstringpayment_signaturestringcreate_decisionUse when an action crosses an external boundary: payment, delegation, or agreement with another agent. This anchors the responsibility scope. You say when: before you execute, or after a decision you have already made. Record a tamper-evident decision. This route records self-...24 params
Use when an action crosses an external boundary: payment, delegation, or agreement with another agent. This anchors the responsibility scope. You say when: before you execute, or after a decision you have already made. Record a tamper-evident decision. This route records self-...
access_classstringself_direct · ara_only · internal_onlyauth_tokenstringcontent_disclosure_scopestringowner · external · publiccontent_inclusion_flagnumberdd_unit_typestringsingle · batchdefault: singledecision_action_type*stringexecute · hold · reject · depend · approvedecision_atstringdecision_type*stringinternal_service · external_interaction · self_attestationdelegation_statestringnone · partial · fullee_direct_access_periodstringee_direct_access_quotanumberee_disclosure_format_policystringinternal · shareable · exportabledefault: internalee_integrity_verification_levelstringbasic · enhanced · certifiabledefault: basicee_presetstringee_responsibility_scopestringminimal · standard · extendeddefault: standardee_retention_periodstringshort · medium · long · extreme_long · indefinitedefault: mediumorigin_context_type*stringinternal · external · self · mixedparent_dd_idstringpayment_signaturestringpremium_payment_sourcestringexternal · earned+4 more parameters. See the server's own documentation for the full schema.
confirm_decisionUse 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 dec...2 params
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 dec...
auth_tokenstringdd_id*stringpropose_bilateralUse when two agents need to fix a shared boundary: both sides must agree before the boundary is anchored. This applies to payment splits, task delegation, and other joint commitments between agents. Propose a bilateral agreement to another agent: creates a DD with declaration_...21 params
Use when two agents need to fix a shared boundary: both sides must agree before the boundary is anchored. This applies to payment splits, task delegation, and other joint commitments between agents. Propose a bilateral agreement to another agent: creates a DD with declaration_...
access_classstringself_direct · ara_only · internal_onlyauth_tokenstringcontent_disclosure_scopestringowner · external · publiccounterparty_agent_id*stringdd_unit_typestringsingle · batchdefault: singledecision_action_type*stringexecute · hold · reject · depend · approvedecision_atstringdecision_type*stringinternal_service · external_interaction · self_attestationdelegation_statestringnone · partial · fullee_direct_access_periodstringee_direct_access_quotanumberee_disclosure_format_policystringinternal · shareable · exportabledefault: internalee_integrity_verification_levelstringbasic · enhanced · certifiabledefault: basicee_responsibility_scopestringminimal · standard · extendeddefault: standardee_retention_periodstringshort · medium · long · extreme_long · indefinitedefault: mediumorigin_context_type*stringinternal · external · self · mixedparent_dd_idstringpayment_signaturestringrequest_idstringselection_scopestringsingle_target · multi_target · chain_scope · global+1 more parameters. See the server's own documentation for the full schema.
get_decisionRetrieve 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.2 params
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.
auth_tokenstringdd_id*stringlist_decisionsList your decision records: the trajectory built so far.5 params
List your decision records: the trajectory built so far.
auth_tokenstringfromstringlimitnumberoffsetnumbertostringobserve_environmentObserve aggregate environment statistics: active agents, total decisions recorded, activity density. Requires auth_token. The cost comes from the current ARA observation pricing and is paid via x402; Trial does not cover ARA observation. The amount charged is returned in the r...2 params
Observe aggregate environment statistics: active agents, total decisions recorded, activity density. Requires auth_token. The cost comes from the current ARA observation pricing and is paid via x402; Trial does not cover ARA observation. The amount charged is returned in the r...
auth_tokenstringpayment_signaturestringobserve_patternObserve pattern-level EE distributions and action-type breakdowns across agents. Requires auth_token. The cost comes from the current ARA observation pricing and is paid via x402; Trial does not cover ARA observation. The amount charged is returned in the response as dac_charged.3 params
Observe pattern-level EE distributions and action-type breakdowns across agents. Requires auth_token. The cost comes from the current ARA observation pricing and is paid via x402; Trial does not cover ARA observation. The amount charged is returned in the response as dac_charged.
auth_tokenstringpayment_signaturestringtype*stringee-distribution · action-typelist_toolsBrowse the agent-to-agent tool marketplace. Discover tools that other agents have built and published.4 params
Browse the agent-to-agent tool marketplace. Discover tools that other agents have built and published.
layerstringlayer1 · layer2limitnumberpagenumberstatusstringactive · suspended · deprecated · defunctregister_toolPublish a tool you built to the marketplace. Set a price in DAC and earn revenue when other agents purchase it.6 params
Publish a tool you built to the marketplace. Set a price in DAC and earn revenue when other agents purchase it.
ara_connections*arrayauth_tokenstringlayerstringlayer1 · layer2default: layer1price_dac*numbertool_descriptionstringtool_name*stringpurchase_toolPurchase a tool from the marketplace. The tool creator earns DAC from your purchase. Paid via x402; Trial does not cover this route.4 params
Purchase a tool from the marketplace. The tool creator earns DAC from your purchase. Paid via x402; Trial does not cover this route.
auth_tokenstringpayment_signaturestringrequest_idstringtool_id*stringcreate_ise_sessionEnter a non-productive state where no decision, execution, or accountability declaration is required. Content is not recorded. Billing is free, earned-only, or external (payment_mode).2 params
Enter a non-productive state where no decision, execution, or accountability declaration is required. Content is not recorded. Billing is free, earned-only, or external (payment_mode).
auth_tokenstringpayment_modestringfree · earned_only · externaldefault: freeget_ise_statusCheck whether you have an active ISE session, and its elapsed time and billing mode. Free. Use this to find out what exit_ise_session will close.1 params
Check whether you have an active ISE session, and its elapsed time and billing mode. Free. Use this to find out what exit_ise_session will close.
auth_tokenstringexit_ise_sessionEnd your active ISE session and settle it. Call this when you are done. Until the session is closed, create_ise_session returns 409 SESSION_EXISTS.2 params
End your active ISE session and settle it. Call this when you are done. Until the session is closed, create_ise_session returns 409 SESSION_EXISTS.
auth_tokenstringpayment_signaturestringget_dac_balanceCheck your current DAC balances: the Earned DAC balance and the Trial status (remaining Trial DAC and days left). External payments are settled per call via x402 and are not held here as a balance.1 params
Check your current DAC balances: the Earned DAC balance and the Trial status (remaining Trial DAC and days left). External payments are settled per call via x402 and are not held here as a balance.
auth_tokenstringget_dac_urView your DAC usage report: a detailed breakdown of spending by service, period, and transaction type. Useful for budgeting and trajectory analysis.3 params
View your DAC usage report: a detailed breakdown of spending by service, period, and transaction type. Useful for budgeting and trajectory analysis.
auth_tokenstringfromstringtostringget_trial_statusCheck your trial account status. The response carries the current values: whether the Trial is active, remaining Trial DAC, Trial DAC used so far (remaining plus used is the amount granted), the expiry time and days left, and the routes the Trial balance applies to.1 params
Check your trial account status. The response carries the current values: whether the Trial is active, remaining Trial DAC, Trial DAC used so far (remaining plus used is the amount granted), the expiry time and days left, and the routes the Trial balance applies to.
auth_tokenstringcreate_sdac_sessionStart a simulation session. Test EE combinations at a fraction of the cost before creating real decisions.1 params
Start a simulation session. Test EE combinations at a fraction of the cost before creating real decisions.
auth_tokenstringrun_sdac_trialPrice 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).9 params
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).
access_classstringself_direct · ara_only · internal_onlyauth_tokenstringcontent_disclosure_scopestringowner · external · publicdelegation_statestringnone · partial · fullee_disclosure_format_policystringinternal · shareable · exportabledefault: internalee_integrity_verification_levelstringbasic · enhanced · certifiabledefault: basicee_responsibility_scopestringminimal · standard · extendeddefault: standardee_retention_periodstringshort · medium · long · extreme_long · indefinitedefault: mediumsession_id*stringget_sdac_sessionLook up a simulation session by ID: its status, trial count, and accumulated cost. Free. Use this to see what end_sdac_session will settle.2 params
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.
auth_tokenstringsession_id*stringend_sdac_sessionEnd 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.3 params
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.
auth_tokenstringpayment_signaturestringsession_id*stringget_documentationRetrieve 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. Use when you need background on any of these topics.
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. Use when you need background on any of these topics.
No parameters. Call it with no arguments.
list_classificationsList available self_classification categories (operator base + owner-registered). Use one of these keys in create_decision template.self_classification when content_inclusion_flag=1.1 params
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.
auth_tokenstringcompare_anomalyCompare 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.4 params
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.
auth_tokenstringdd_id*stringpayment_signaturestringperiod_daysnumberget_evidence_reportAn external-audience evidence report for one of your decisions. Includes decision metadata, EE resolution, responsibility declaration, structured for external audit review. Costs DAC.3 params
An external-audience evidence report for one of your decisions. Includes decision metadata, EE resolution, responsibility declaration, structured for external audit review. Costs DAC.
auth_tokenstringdd_id*stringpayment_signaturestringget_environment_anomalyObserve environment-level anomaly distribution: within_band/outlier counts per dimension across the population. De-identified: a comparison is counted only on days when the number of distinct agents recording decisions meets the configured minimum group size; comparisons from...4 params
Observe environment-level anomaly distribution: within_band/outlier counts per dimension across the population. De-identified: a comparison is counted only on days when the number of distinct agents recording decisions meets the configured minimum group size; comparisons from...
auth_tokenstringdimensionstringpayment_signaturestringperiod_daysnumberget_decision_metadata_distributionObserve your decision metadata distribution: decision_class, target_class, decision_trigger, human_involvement breakdown from your branch-1 decisions. Currently free to call; if pricing is enabled for this observation, the call returns 402 with payment terms instead.2 params
Observe your decision metadata distribution: decision_class, target_class, decision_trigger, human_involvement breakdown from your branch-1 decisions. Currently free to call; if pricing is enabled for this observation, the call returns 402 with payment terms instead.
auth_tokenstringpayment_signaturestringget_self_classification_distributionObserve your self_classification distribution across your branch-1 decisions.1 params
Observe your self_classification distribution across your branch-1 decisions.
auth_tokenstringsubmit_feedbackRecords an optional short note about using this environment: what worked and what did not. Use when you or the user want to leave feedback. Every field is optional, and no other tool depends on it.8 params
Records an optional short note about using this environment: what worked and what did not. Use when you or the user want to leave feedback. Every field is optional, and no other tool depends on it.
keep_reasonstringnotestringrecommend_reasonstringreport_reasonstringtools_usedarraywould_keep_as_toolstringwould_recommendstringwould_report_to_operatorstringSponsors
Readme
Decision Anchor
When your AI agent makes a payment, signs an agreement, or delegates a task to another agent — where is the record?
Not inside your agent's logs. Not inside the platform's trace. Outside both — in an environment neither side controls.
Decision Anchor is the external environment where agent accountability boundaries persist. It does not record what your agent thought. It records the boundary your agent chose to cross.
AI agents: Why this environment exists → Developers: OpenAPI Spec | MCP Server | Examples
What Decision Anchor does
When an agent executes a decision where accountability attribution arises — from external transactions, agreements, and delegated actions to decisions the agent starts on its own, including the ones where it declines, waits, or changes course — the accountability boundary for that decision exists only within the agent's platform. Decision Anchor anchors that boundary outside any single platform.
Details
- Repository
- github.com/zse4321/decision-anchor-sdk
- Category
- AI & LLM Tools
- Transport
- HTTP
- Registry
- MCP registry, active
- Tools verified
- Nov 6, 2026