dossaro docs

Research MCP reference

Tools, workflows, source coverage and jurisdiction limits for the dossaro MCP.

Updated 2026-06-11

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Connect dossaro to your research workflow

Add dossaro to Claude or ChatGPT and run source-backed register research from your own workspace.

dossaro exposes a read-only Model Context Protocol server for source-backed private-market, company-register and document research. It gives supported agent hosts a stable tool layer for searching registers, resolving entities, listing public documents and parsing readable text where the underlying source allows it.

Endpoint and auth#

Use this MCP server URL in supported connector hosts:

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https://mcp.dossaro.com/mcp

Authentication is OAuth. The connector host opens a dossaro authorization screen, the user signs in, and dossaro grants the host access to the MCP tools for that account. Tool calls are account-scoped and may consume credits or hit subscription limits.

The MCP does not receive the user's ChatGPT or Claude password. Connector setup is controlled by the host, while dossaro controls account authorization, credit limits and source access.

How agents should use it#

Use the MCP as a register evidence layer, not as an autonomous legal or investment decision maker.

For one company:

Call search_entities first, preferably with exact register identifiers when the user provides them.
Keep the returned entityRef. Use it for follow-up calls instead of reconstructing source-native identifiers.
Call get_entity_details for one-hop evidence surfaces such as profile, officers, documents, financials and insolvency.
Call list_documents before parse_document when readable source text is needed.
Keep the returned documentRef. Pass that handle to parse_document instead of rebuilding row keys, publication IDs or register fields.
Treat partial, blocked, unavailable or credential-gated source responses as review reasons, not as negative evidence.

For longlists, use the batch primitives for repeated independent searches, but keep the row composition in the calling agent. render_research_table is for presenting already-researched rows; it does not query registers or validate facts.

Tool reference#

Group	Tools	Use
Discovery and account	`get_capabilities`, `get_usage_limits`, `submit_feedback`	Inspect coverage, source operations, account credits and report source/tool issues.
Entity research	`search_entities`, `search_entities_batch`, `resolve_entity`, `get_entity_profile`, `get_entity_details`	Find candidates, normalize one selected result and fetch source-backed profile or detail evidence.
Evidence and documents	`search_evidence`, `search_evidence_batch`, `search_relationships`, `list_documents`, `list_documents_batch`, `parse_document`	Search filings/notices/regulatory evidence, list public document refs and parse readable text, OCR or tables where available.
Advanced and output	`source_raw`, `render_research_table`	Run allowlisted source-native inspection operations, or render final agent-composed research rows as a read-only table.

Important limits#

dossaro is not legal, tax, financial, investment, compliance or official registry advice.
The MCP does not synthesize shareholder rows, cap tables, beneficial-ownership conclusions, structured revenue, EBITDA or other financial facts.
Relationship surfaces are source-backed one-hop evidence only. Empty officers, PSC/control or relationship arrays must not be treated as proof that no ownership or control relationship exists.
Public/free source limits apply. Some registers expose only search/profile data, some documents are paid, login-bound or credential-gated, and some parsers only work for selected public artifacts.
source_raw is allowlisted source-native inspection, not arbitrary URL fetching.
Parsed text, OCR and tables are evidence aids. Human review is required before relying on source material.

Jurisdiction coverage summary#

The current public core suite matches the landing-page coverage rail.

Jurisdiction	Code	Sources	Best for
United Kingdom	UK	3	Companies House filings and profile data, PSC/control evidence, Gazette notices, FCA regulatory data.
Germany	DE	4	Handelsregister identity, shareholder-list documents, Unternehmensregister accounting-publication metadata, insolvency notices, BaFin regulatory data.
Belgium	BE	2	CBE/KBO company profiles, NBB annual accounts, Belgian Moniteur publications.
France	FR	3	Recherche Entreprises profiles, RNE document metadata where configured, BODACC publications, AMF regulatory/fund evidence.
Luxembourg	LU	2	LBR RCS search/profile signals, CSSF supervised entity and fund/regulatory relationship evidence.
Switzerland	CH	1	Zefix company identity, cantonal excerpt links and SOGC/SHAB publication references where exposed.
Austria	AT	6	Firmenbuch identity, EVI profile/publications, Ediktsdatei notices, FMA regulatory data and GISA trade-license evidence.
Poland	PL	1	KRS company identity, public current/full extracts, RAR document refs and register-document evidence.

Register source matrix#

Jurisdiction	Source ID	Source type	Available information	Important limits
UK	`uk_companies_house`	Company register	Search/profile, filing history, document metadata and public document parse; officers, PSC/control, charges and company insolvency where exposed by the API.	Document parsing is partial and source-dependent.
UK	`uk_gazette`	Insolvency/notice register	Gazette notice search, public notice artifacts, HTML/text, PDF and linked-data formats.	Notices are evidence, not ownership relationships.
UK	`uk_fca`	Fund/regulatory register	Official FS Register search/get for firms, individuals and funds/CIS; appointed representatives, controllers, principals, permissions, restrictions and subresources where exposed.	Requires configuration where applicable; regulatory evidence is not ownership conclusion evidence.
DE	`de_handelsregister`	Company register	Search/profile, structured register info, register documents and shareholder-list documents; selected public register/shareholder document parse.	Document-derived shareholder relationships require explicit parsing; bytes are not exposed directly.
DE	`de_unternehmensregister`	Filing register	Annual-report/accounting-publication search, metadata and readable text where public publication fetch/parse succeeds.	Accounting-publication metadata is not structured revenue or financial-fact extraction.
DE	`de_insolvenzbekanntmachungen`	Insolvency register	Insolvency publication search, publication refs and source text.	Distress evidence only; no ownership relationships.
DE	`de_bafin`	Fund/regulatory register	InstInfo/FondsInfo regulated entities and funds, search/get/export and management-company portfolio evidence.	Regulatory database/export evidence, not normal document parsing or company-register ownership evidence.
BE	`be_cbe`	Company register	CBE/KBO search/profile, CBE links, NBB annual-account refs and NBB PDF/XBRL fetch/parse where exposed.	Public functions/officers and establishment units are partial; shareholders/BO are not exposed.
BE	`be_moniteur`	Filing register	Belgian Moniteur publication search, publication rows, article refs, PDF URLs, article HTML text and PDF parse where exposed.	Event labels come from public notice text; not ownership conclusions.
FR	`fr_recherche_entreprises`	Company register	Recherche Entreprises profile/search, public profile signals and Data INPI RNE acts/accounts where configured.	RNE document parse depends on Data INPI/API Entreprise credentials; not BO evidence.
FR	`fr_bodacc`	Filing register	BODACC publication records, commercial announcement rows, HTML detail and unit PDF artifacts.	Public notice/event labels only.
FR	`fr_amf`	Fund/regulatory register	AMF GECO SGP, fund and AIFM search/get plus regulatory relationship evidence.	Adapter exists for regulatory/fund evidence; not current normal company filing parse.
LU	`lu_lbr_rcs`	Company register	Search candidates and basic company profile signals.	Detail and filings are auth-bound in the current public-free path; no public-free normal document parse.
LU	`lu_cssf`	Fund/regulatory register	CSSF supervised entity search/get, AIFM portfolio/link evidence and depositary search limitation signals.	Regulatory relationships only; no normal filing document parse through the Basic Tool layer.
CH	`ch_zefix`	Company register	Zefix search/profile, company identity, cantonal excerpt links and SOGC/SHAB references where exposed.	Ref-oriented coverage; no general CH document/account parse claim and no public BO/shareholder data.
AT	`at_firmenbuch`	Company register	JustizOnline `service/fba` search/profile/detail and public identity anchors.	Paid extracts and WiEReG/UBO are not public-free adapter capabilities.
AT	`at_evi_firmenbuch`	Company register	EVI company profile fetch, search, current publication rows and publication handoff.	Source-native Personen/Gesellschafter rows are evidence, not beneficial-ownership conclusions.
AT	`at_evi_publications`	Filing register	EVI publication search/list, public publication refs, readable HTML text and public artifact refs where exposed.	No financial-fact extraction.
AT	`at_edikte`	Insolvency register	Austrian Ediktsdatei insolvency/notice search, public notice details and HTML text parse.	Notices are distress evidence only.
AT	`at_fma`	Fund/regulatory register	Regulated entities, funds and warning search where public access or retriever configuration is available.	Regulatory/fund relationship evidence only where source rows expose it.
AT	`at_gisa`	Company/operational register	Public V1 trade-license query path and optional keyed V2 extracts.	Operational/trade-license evidence only; not a Firmenbuch substitute.
PL	`pl_krs`	Company register	KRS search/profile, official current and full extract JSON/PDF refs, RAR register document refs and RDF financial-document refs where the browser-backed public route is available.	KRS extracts and documents are register evidence, not beneficial-ownership conclusions; RDF financial documents may be source-blocked and are not required for the base profile/extract path.

Recommended prompts#

Use precise prompts that ask for evidence and source trails:

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Find register evidence for Atlas Beteiligungen GmbH and list source limitations separately.

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Research this longlist of private companies. For each row, resolve the entity, collect profile, documents, financial publication metadata and insolvency evidence, then render a research table with manual review reasons.