Endpoints for conducting a user-facing entity search or matching a local data store against the given dataset.
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openapi: 3.2.0
info:
title: OpenSanctions Matching API
description: '## Introduction
The OpenSanctions API allows users to search and query
the OpenSanctions entity graph.'
termsOfService: https://www.opensanctions.org/docs/terms
contact:
name: OpenSanctions
url: https://www.opensanctions.org/
email: info@opensanctions.org
version: yente 5.5.0
x-logo:
url: https://assets.opensanctions.org/images/ura/logo_text_spaced.svg
externalDocs:
description: Home page
url: https://www.opensanctions.org
tags:
- name: Matching
description: Endpoints for conducting a user-facing entity search or matching a local data store against the given dataset.
externalDocs:
description: Data dictionary
url: https://opensanctions.org/reference/
paths:
/match/{dataset}:
post:
tags:
- Matching
summary: Query by example matcher
description: 'Match entities based on a complex set of criteria, like name, date of birth
and nationality of a person. This works by submitting a batch of entities, each
formatted like those returned by the API.
Tutorials:
* Using the matching API
* Configuring the scoring system
For example, the following would be valid query examples:
```json
"queries": {
"entity1": {
"schema": "Person",
"properties": {
"name": ["John Doe"],
"birthDate": ["1975-04-21"],
"nationality": ["us"]
}
},
"entity2": {
"schema": "Company",
"properties": {
"name": ["Brilliant Amazing Limited"],
"jurisdiction": ["hk"],
"registrationNumber": ["84BA99810"]
}
}
}
```
The values for `entity1`, `entity2` can be chosen freely to correlate results
on the client side when the request is returned. The responses will be given
for each submitted example like this:
```json
"responses": {
"entity1": {
"query": {},
"results": [...]
},
"entity2": {
"query": {},
"results": [...]
}
}
```
The precision of the results will be dependent on the amount of detail submitted
with each example. The following properties are most helpful for particular types:
* **Person**: ``name``, ``birthDate``, ``nationality``, ``idNumber``, ``address``
* **Organization**: ``name``, ``country``, ``registrationNumber``, ``address``
* **Company**: ``name``, ``jurisdiction``, ``registrationNumber``, ``address``,
``incorporationDate``'
operationId: match_match__dataset__post
parameters:
- name: dataset
in: path
required: true
schema:
type: string
description: Data source or collection name to scope the query to.
examples:
- default
title: Dataset
description: Data source or collection name to scope the query to.
- name: limit
in: query
required: false
schema:
type: integer
maximum: 500
title: Number of results to return
default: 5
- name: threshold
in: query
required: false
schema:
type: number
title: Score threshold for results to be considered matches
default: 0.7
- name: cutoff
in: query
required: false
schema:
type: number
title: Deprecated, use `threshold` instead. Lower bound of score for results to be returned at all
deprecated: true
default: 0.7
deprecated: true
- name: algorithm
in: query
required: false
schema:
type: string
title: 'Scoring algorithm to use, currently "best" is defined as logic-v2, options: logic-v2, ofac, name-based, name-qualified, logic-v1, regression-v1'
default: best
- name: include_dataset
in: query
required: false
schema:
type: array
items:
type: string
title: Only include the given datasets in results
default: []
- name: exclude_schema
in: query
required: false
schema:
type: array
items:
type: string
title: Remove the given types of entities from results
default: []
- name: exclude_dataset
in: query
required: false
schema:
type: array
items:
type: string
title: Remove the given datasets from results
default: []
- name: topics
in: query
required: false
schema:
type: array
items:
type: string
title: Only return results that match any of the given topics
default: []
- name: changed_since
in: query
required: false
schema:
anyOf:
- type: string
pattern: ^\d{4}-\d{2}-\d{2}(T\d{2}(:\d{2}(:\d{2})?)?)?$
- type: 'null'
title: Match against entities that were updated since the given date
- name: exclude_entity_ids
in: query
required: false
schema:
type: array
items:
type: string
maxItems: 50
title: A list of entities IDs to exclude from matching
description: The entity IDs supplied here do not have to be canonical. Supplying any of the referents of a merged entity will exclude that entity. This parameter may be useful for example to exclude false-positive matches that have been decided upon by a human.
default: []
description: The entity IDs supplied here do not have to be canonical. Supplying any of the referents of a merged entity will exclude that entity. This parameter may be useful for example to exclude false-positive matches that have been decided upon by a human.
requestBody:
required: true
content:
application/json:
schema:
$ref: '#/components/schemas/EntityMatchQuery'
responses:
'200':
description: Successful Response
content:
application/json:
schema:
$ref: '#/components/schemas/EntityMatchResponse'
'400':
description: Invalid query
content:
application/json:
schema:
$ref: '#/components/schemas/ErrorResponse'
'500':
description: Server error
content:
application/json:
schema:
$ref: '#/components/schemas/ErrorResponse'
'422':
description: Validation Error
content:
application/json:
schema:
$ref: '#/components/schemas/HTTPValidationError'
/search/{dataset}:
get:
tags:
- Matching
summary: Simple entity search
description: 'Search endpoint for matching entities based on a simple piece of text, e.g.
a name. This can be used to implement a simple, user-facing search. For proper
entity matching, the multi-property matching API should be used instead.
Search queries can include field-specific fitlers, wildcards and fuzzy searches.
See also: search API documentation.'
operationId: search_search__dataset__get
parameters:
- name: dataset
in: path
required: true
schema:
type: string
description: Data source or collection name to scope the query to.
examples:
- default
title: Dataset
description: Data source or collection name to scope the query to.
- name: q
in: query
required: false
schema:
type: string
title: Query text
default: ''
- name: schema
in: query
required: false
schema:
type: string
title: Types of entities that can match the search
default: Thing
- name: include_dataset
in: query
required: false
schema:
type: array
items:
type: string
title: Restrict the search scope to datasets (that are in the given scope) to search entities within.
description: Limit the results to entities that are part of at least one of the given datasets.
default: []
description: Limit the results to entities that are part of at least one of the given datasets.
- name: exclude_dataset
in: query
required: false
schema:
type: array
items:
type: string
title: Remove specific datasets (that are in the given scope) from the search scope.
default: []
- name: exclude_schema
in: query
required: false
schema:
type: array
items:
type: string
title: Remove the given types of entities from results
default: []
- name: changed_since
in: query
required: false
schema:
anyOf:
- type: string
pattern: ^\d{4}-\d{2}-\d{2}(T\d{2}(:\d{2}(:\d{2})?)?)?$
- type: 'null'
title: Search entities that were updated since the given date
- name: countries
in: query
required: false
schema:
type: array
items:
type: string
title: Filter by country codes
default: []
- name: topics
in: query
required: false
schema:
type: array
items:
type: string
title: Filter by entity topics (e.g. sanction, role.pep)
default: []
- name: datasets
in: query
required: false
schema:
type: array
items:
type: string
title: Filter by dataset names, for faceting use (respects operator choice).
default: []
- name: filter
in: query
required: false
schema:
type: array
items:
type: string
title: Filter by entity properties (e.g. programId, birthDate)
description: Use the syntax `field:value` to filter on a specific field. Properties are indexed as fields named `properties.birthDate:1985`.
default: []
description: Use the syntax `field:value` to filter on a specific field. Properties are indexed as fields named `properties.birthDate:1985`.
- name: limit
in: query
required: false
schema:
type: integer
maximum: 500
title: Number of results to return
default: 10
- name: offset
in: query
required: false
schema:
type: integer
maximum: 9499
title: Start at result with given offset
default: 0
- name: sort
in: query
required: false
schema:
type: array
items:
type: string
title: Sorting criteria
default: []
- name: target
in: query
required: false
schema:
anyOf:
- type: boolean
- type: 'null'
title: Include only targeted entities
description: Please specify a list of topics of concern, instead.
deprecated: true
description: Please specify a list of topics of concern, instead.
deprecated: true
- name: fuzzy
in: query
required: false
schema:
type: boolean
title: Allow fuzzy query syntax
default: false
- name: simple
in: query
required: false
schema:
type: boolean
title: Use simple syntax for user-facing query boxes
default: false
- name: facets
in: query
required: false
schema:
type: array
items:
$ref: '#/components/schemas/Facet'
title: Facet counts to include in response.
default:
- countries
- topics
- datasets
- name: filter_op
in: query
required: false
schema:
$ref: '#/components/schemas/Operator'
title: Define behaviour of multiple filters on one field
description: Logic to use when combining multiple filters on the same field (topics, countries, datasets). Please specify AND for new integrations (to override a legacy default) and when building a faceted user interface.
default: OR
description: Logic to use when combining multiple filters on the same field (topics, countries, datasets). Please specify AND for new integrations (to override a legacy default) and when building a faceted user interface.
responses:
'200':
description: Successful Response
content:
application/json:
schema:
$ref: '#/components/schemas/SearchResponse'
'400':
description: Invalid query
content:
application/json:
schema:
$ref: '#/components/schemas/ErrorResponse'
'500':
description: Server error
content:
application/json:
schema:
$ref: '#/components/schemas/ErrorResponse'
'422':
description: Validation Error
content:
application/json:
schema:
$ref: '#/components/schemas/HTTPValidationError'
components:
schemas:
SearchFacet:
properties:
label:
type: string
title: Label
examples:
- Countries
values:
items:
$ref: '#/components/schemas/SearchFacetItem'
type: array
title: Values
type: object
required:
- label
- values
title: SearchFacet
EntityResponse:
properties:
id:
type: string
title: Id
examples:
- NK-A7z....
caption:
type: string
title: Caption
examples:
- John Doe
schema:
type: string
title: Schema
examples:
- LegalEntity
properties:
additionalProperties:
items:
anyOf:
- type: string
- $ref: '#/components/schemas/EntityResponse'
type: array
type: object
title: Properties
examples:
- name:
- John Doe
datasets:
items:
type: string
type: array
title: Datasets
default: []
examples:
- - us_ofac_sdn
referents:
items:
type: string
type: array
title: Referents
default: []
examples:
- - ofac-1234
target:
type: boolean
title: Target
default: false
first_seen:
title: First Seen
examples:
- '2026-01-01T12:00:00Z'
last_seen:
title: Last Seen
examples:
- '2026-01-01T12:00:00Z'
last_change:
title: Last Change
examples:
- '2026-01-01T12:00:00Z'
type: object
required:
- id
- caption
- schema
- properties
title: EntityResponse
ScoredEntityResponse:
properties:
id:
type: string
title: Id
examples:
- NK-A7z....
caption:
type: string
title: Caption
examples:
- John Doe
schema:
type: string
title: Schema
examples:
- LegalEntity
properties:
additionalProperties:
items:
anyOf:
- type: string
- $ref: '#/components/schemas/EntityResponse'
type: array
type: object
title: Properties
examples:
- name:
- John Doe
datasets:
items:
type: string
type: array
title: Datasets
default: []
examples:
- - us_ofac_sdn
referents:
items:
type: string
type: array
title: Referents
default: []
examples:
- - ofac-1234
target:
type: boolean
title: Target
default: false
first_seen:
title: First Seen
examples:
- '2026-01-01T12:00:00Z'
last_seen:
title: Last Seen
examples:
- '2026-01-01T12:00:00Z'
last_change:
title: Last Change
examples:
- '2026-01-01T12:00:00Z'
score:
type: number
title: Score
default: 0.99
explanations:
additionalProperties:
$ref: '#/components/schemas/FeatureResult'
type: object
title: Explanations
description: A dictionary of subscores from features in the algorithm and explanations for how they were calculated.
match:
type: boolean
title: Match
description: Whether the score is above the match threshold.
type: object
required:
- id
- caption
- schema
- properties
- explanations
- match
title: ScoredEntityResponse
TotalSpec:
properties:
value:
type: integer
title: Value
examples:
- 42
relation:
type: string
title: Relation
default: eq
examples:
- eq
type: object
required:
- value
title: TotalSpec
SearchResponse:
properties:
limit:
type: integer
title: Limit
examples:
- 20
offset:
type: integer
title: Offset
default: 0
examples:
- 0
total:
$ref: '#/components/schemas/TotalSpec'
results:
items:
$ref: '#/components/schemas/EntityResponse'
type: array
title: Results
facets:
additionalProperties:
$ref: '#/components/schemas/SearchFacet'
type: object
title: Facets
type: object
required:
- limit
- total
- results
- facets
title: SearchResponse
Operator:
type: string
enum:
- AND
- OR
title: Operator
ErrorResponse:
properties:
detail:
type: string
title: Detail
examples:
- Detailed error message
type: object
required:
- detail
title: ErrorResponse
EntityMatchResponse:
properties:
responses:
additionalProperties:
$ref: '#/components/schemas/EntityMatches'
type: object
title: Responses
limit:
type: integer
title: Limit
examples:
- 5
type: object
required:
- responses
- limit
title: EntityMatchResponse
EntityMatchQuery:
properties:
weights:
additionalProperties:
type: number
type: object
title: Weights
default: {}
examples:
- name_literal: 0.8
config:
additionalProperties:
anyOf:
- type: string
- type: integer
- type: number
- type: boolean
- type: 'null'
type: object
title: Config
description: Algorithm-specific configuration parameters.
examples:
- nm_number_mismatch: 0.4
queries:
additionalProperties:
$ref: '#/components/schemas/EntityExample'
type: object
title: Queries
type: object
required:
- queries
title: EntityMatchQuery
ValidationError:
properties:
loc:
items:
anyOf:
- type: string
- type: integer
type: array
title: Location
msg:
type: string
title: Message
type:
type: string
title: Error Type
input:
title: Input
ctx:
type: object
title: Context
type: object
required:
- loc
- msg
- type
title: ValidationError
EntityExample:
properties:
id:
anyOf:
- type: string
- type: 'null'
title: Id
examples:
- my-entity-id
schema:
type: string
title: Schema
examples:
- Person
properties:
additionalProperties:
anyOf:
- type: string
- items: {}
type: array
type: object
title: Properties
examples:
- name:
- John Doe
type: object
required:
- schema
- properties
title: EntityExample
EntityMatches:
properties:
status:
type: integer
title: Status
default: 200
examples:
- 200
results:
items:
$ref: '#/components/schemas/ScoredEntityResponse'
type: array
title: Results
total:
$ref: '#/components/schemas/TotalSpec'
query:
$ref: '#/components/schemas/EntityExample'
type: object
required:
- results
- total
- query
title: EntityMatches
Facet:
type: string
enum:
- datasets
- schema
- countries
- identifiers
- topics
- genders
title: Facet
HTTPValidationError:
properties:
detail:
items:
$ref: '#/components/schemas/ValidationError'
type: array
title: Detail
type: object
title: HTTPValidationError
SearchFacetItem:
properties:
name:
type: string
title: Name
examples:
- ru
label:
type: string
title: Label
examples:
- Russia
count:
type: integer
title: Count
default: 1
examples:
- 42
type: object
required:
- name
- label
title: SearchFacetItem
FeatureResult:
properties:
detail:
anyOf:
- type: string
- type: 'null'
title: Detail
score:
type: number
title: Score
query:
anyOf:
- type: string
- type: 'null'
title: Query
candidate:
anyOf:
- type: string
- type: 'null'
title: Candidate
type: object
required:
- detail
- score
title: FeatureResult
description: A explained score for a particular feature result.