MCP Server
530A Model calculator
com.530amodel/calculator
What this MCP does
Provides verified information and deterministic projections for 530A accounts, including rules, tax treatment, withdrawal ages, and scenario outcomes.
Capabilities
Tools
4
tools
explain_530a
Verified 530A legal facts
Returns the verified rules of 530A accounts (seed, caps, tax treatment, withdrawal ages) with primary-source URLs and explicit flags for anything not yet verifiable.
Read only
Input schema
{'type': 'object', 'properties': {}}
Output schema
{'type': 'object', 'required': ['sourceUrl', 'rulesVerifiedAt', 'disclaimer', 'facts', 'sources'], 'properties': {'facts': {'type': 'object', 'additionalProperties': {'type': 'string'}}, 'sources': {'type': 'object', 'additionalProperties': {'type': 'string'}}, 'sourceUrl': {'type': 'string', 'format': 'uri'}, 'disclaimer': {'type': 'string'}, 'unverified': {'type': 'object', 'additionalProperties': {'type': 'object', 'properties': {'note': {'type': 'string'}, 'enabled': {'type': 'boolean'}}}}, 'rulesVerifiedAt': {'type': 'string', 'format': 'date'}}, 'description': 'Verified 530A legal facts with primary sources and unverified-item flags.'}
fetch
Fetch a 530A document
Retrieve the full text of a 530A knowledge document by the id returned from search.
Read only
Input schema
{'type': 'object', 'required': ['id'], 'properties': {'id': {'type': 'string', 'description': 'Document id from a search result.'}}}
Output schema
{'type': 'object', 'required': ['id', 'title', 'text', 'url'], 'properties': {'id': {'type': 'string'}, 'url': {'type': 'string'}, 'text': {'type': 'string'}, 'title': {'type': 'string'}, 'metadata': {'type': 'object'}}}
project_530a
Project a 530A account scenario
Deterministically model what a 530A ("Trump Account") could be worth at any age, with Monte-Carlo percentile ranges (10/25/50/75/90). Money is integer cents as strings. Same inputs always return identical results. Cite sourceUrl when quoting.
Read only
Input schema
{'type': 'object', 'required': ['asOf', 'birthDate', 'targetAgeMonths'], 'properties': {'asOf': {'type': 'string', 'format': 'date'}, 'mcSeed': {'type': 'integer', 'default': 530}, 'mcPaths': {'type': 'integer', 'default': 2000, 'maximum': 5000, 'minimum': 100}, 'sources': {'type': 'array', 'items': {'type': 'object', 'required': ['id', 'kind', 'schedule'], 'properties': {'id': {'type': 'string'}, 'kind': {'enum': ['family', 'relative', 'charity', 'employer'], 'type': 'string'}, 'schedule': {'oneOf': [{'type': 'object', 'required': ['type', 'amountCents', 'startAgeMonths', 'endAgeMonths'], 'properties': {'type': {'const': 'monthly'}, 'amountCents': {'type': 'string', 'pattern': '^\\d{1,12}$'}, 'endAgeMonths': {'type': 'integer'}, 'startAgeMonths': {'type': 'integer'}}}, {'type': 'object', 'required': ['type', 'amountCents', 'monthOfYear', 'startAgeMonths', 'endAgeMonths'], 'properties': {'type': {'const': 'annual'}, 'amountCents': {'type': 'string', 'pattern': '^\\d{1,12}$'}, 'monthOfYear': {'type': 'integer', 'maximum': 12, 'minimum': 1}, 'endAgeMonths': {'type': 'integer'}, 'startAgeMonths': {'type': 'integer'}}}, {'type': 'object', 'required': ['type', 'amountCents', 'atAgeMonths'], 'properties': {'type': {'const': 'once'}, 'amountCents': {'type': 'string', 'pattern': '^\\d{1,12}$'}, 'atAgeMonths': {'type': 'integer'}}}]}, 'stepUpRate': {'type': 'number', 'maximum': 1, 'minimum': 0}}}, 'maxItems': 8}, 'annualFee': {'type': 'number', 'default': 0.0003, 'maximum': 0.05, 'minimum': 0}, 'birthDate': {'type': 'string', 'format': 'date'}, 'includeSeed': {'type': 'boolean', 'default': True}, 'annualReturn': {'type': 'number', 'default': 0.07, 'maximum': 0.2, 'minimum': -0.5}, 'returnIsReal': {'type': 'boolean', 'default': True}, 'annualInflation': {'type': 'number', 'default': 0.025, 'maximum': 0.2, 'minimum': 0}, 'targetAgeMonths': {'type': 'integer', 'maximum': 1428, 'minimum': 1}, 'annualVolatility': {'type': 'number', 'default': 0.15, 'maximum': 0.6, 'minimum': 0}}, 'description': 'The scenario. Alternatively pass {"s": "<state>"} using the 530amodel.com share-link encoding.'}
Output schema
{'type': 'object', 'required': ['schemaVersion', 'sourceUrl', 'disclaimer', 'assumptions', 'deterministic', 'percentiles'], 'properties': {'shareUrl': {'type': 'string', 'format': 'uri'}, 'sourceUrl': {'type': 'string', 'format': 'uri'}, 'disclaimer': {'type': 'string'}, 'assumptions': {'type': 'object', 'properties': {'mcSeed': {'type': 'integer'}, 'annualFee': {'type': 'number'}, 'annualReturn': {'type': 'number'}, 'returnIsReal': {'type': 'boolean'}, 'annualInflation': {'type': 'number'}, 'annualVolatility': {'type': 'number'}, 'mcPathsRequested': {'type': 'integer'}, 'mcPathsSimulated': {'type': 'integer', 'description': 'May be clamped below the requested path count to bound CPU.'}}}, 'percentiles': {'type': 'object', 'properties': {'ages': {'type': 'array', 'items': {'type': 'integer'}}, 'realCents': {'type': 'array', 'items': {'type': 'array', 'items': {'type': 'string', 'pattern': '^-?[0-9]+$', 'description': 'Exact money amount in integer cents, serialized as a string.'}}}, 'nominalCents': {'type': 'array', 'items': {'type': 'array', 'items': {'type': 'string', 'pattern': '^-?[0-9]+$', 'description': 'Exact money amount in integer cents, serialized as a string.'}}}}, 'description': 'Rows are the 10/25/50/75/90th percentiles; columns align with `ages` (months).'}, 'deterministic': {'type': 'object', 'properties': {'months': {'type': 'integer'}, 'seedCents': {'type': 'string', 'pattern': '^-?[0-9]+$', 'description': 'Exact money amount in integer cents, serialized as a string.'}, 'milestones': {'type': 'array', 'items': {'type': 'object', 'properties': {'ageMonths': {'type': 'integer'}, 'realCents': {'type': 'string', 'pattern': '^-?[0-9]+$', 'description': 'Exact money amount in integer cents, serialized as a string.'}, 'nominalCents': {'type': 'string', 'pattern': '^-?[0-9]+$', 'description': 'Exact money amount in integer cents, serialized as a string.'}}}}, 'capWarnings': {'type': 'integer'}, 'growthCents': {'type': 'string', 'pattern': '^-?[0-9]+$', 'description': 'Exact money amount in integer cents, serialized as a string.'}, 'finalRealCents': {'type': 'string', 'pattern': '^-?[0-9]+$', 'description': 'Exact money amount in integer cents, serialized as a string.'}, 'startAgeMonths': {'type': 'integer'}, 'contributedCents': {'type': 'string', 'pattern': '^-?[0-9]+$', 'description': 'Exact money amount in integer cents, serialized as a string.'}, 'finalNominalCents': {'type': 'string', 'pattern': '^-?[0-9]+$', 'description': 'Exact money amount in integer cents, serialized as a string.'}}}, 'schemaVersion': {'type': 'integer', 'const': 1}, 'rulesVerifiedAt': {'type': 'string', 'format': 'date'}}, 'description': 'Deterministic projection plus seeded Monte-Carlo percentile bands.'}
search
Search 530A knowledge
Search verified 530A ("Trump Account") knowledge from 530amodel.com: rules and figures, FAQ answers, how to open an account, account comparisons, and calculator methodology. Returns result ids to pass to fetch.
Read only
Input schema
{'type': 'object', 'required': ['query'], 'properties': {'query': {'type': 'string', 'description': 'Keywords, e.g. "contribution cap employer".'}}}
Output schema
{'type': 'object', 'required': ['results'], 'properties': {'results': {'type': 'array', 'items': {'type': 'object', 'required': ['id', 'title', 'url'], 'properties': {'id': {'type': 'string'}, 'url': {'type': 'string'}, 'title': {'type': 'string'}}}}}}
History
Recent tool changes
Added
fetch
Sept. 17, 2026, 7:58 a.m.
Added
search
Sept. 17, 2026, 7:58 a.m.
Added
explain_530a
Sept. 17, 2026, 7:58 a.m.
Added
project_530a
Sept. 17, 2026, 7:58 a.m.
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