# 73 Strings

> AI-powered valuation, portfolio monitoring and data extraction for alternative asset managers in private equity, private credit, venture capital, infrastructure and multi-strategy funds. 73 Strings exposes six REST APIs through a Microsoft Azure API Management developer portal, covering asset information, cap tables, documents, financial data, qualitative data and transaction-ledger ingestion.

Generated by API Evangelist on 2026-08-05. Method: generated (73 Strings publishes no llms.txt — https://www.73strings.com/llms.txt returned 404).

Access model: every operation requires a `subscription-key` header bound to an Azure API Management product subscription. Three of the four products require administrator approval. The data behind the API is customer tenant data, so a key is only useful to an existing 73 Strings customer. Every request body must carry `orgId` and `userId`, which determine data access scope.

## APIs

- [Asset Info API](https://api-accord-eut-73strings.developer.azure-api.net/api-details#api=asset-info): Entity lists, entity securities, business units, attribute ids and version lists. Base URL https://api-accord-eut-73strings.azure-api.net/assetinfo — 5 operations.
- [Captable API](https://api-accord-eut-73strings.developer.azure-api.net/api-details#api=captable): Capitalization-table data for a portfolio company, grouped into equity and cash entities by reporting date. Base URL https://api-accord-eut-73strings.azure-api.net/captable — 1 operation.
- [Documents API](https://api-accord-eut-73strings.developer.azure-api.net/api-details#api=documents): List documents attached to a portfolio company and retrieve download details for one document. Base URL https://api-accord-eut-73strings.azure-api.net/documents — 2 operations.
- [Financial Data API](https://api-accord-eut-73strings.developer.azure-api.net/api-details#api=financial-data): Read and write entity, business-unit and security-level financial data, including a v2 server-sent-events streaming variant and an all-financial-texts endpoint. Base URL https://api-accord-eut-73strings.azure-api.net/financial-data — 6 operations.
- [Qualitative Data API](https://api-accord-eut-73strings.developer.azure-api.net/api-details#api=qualitative-data): General entity details, custom attribute data and qualitative analysis data. Base URL https://api-accord-eut-73strings.azure-api.net/qualitative-data — 3 operations.
- [Transaction API](https://api-accord-eut-73strings.developer.azure-api.net/api-details#api=transaction-api): Bulk ingest and retrieval of transaction-ledger records with partial-success handling, platform-generated display ids, and reference endpoints for transaction types and versions. Base URL https://api-accord-eut-73strings.azure-api.net/transactions — 6 operations.

## Specs

- [Asset Info OpenAPI 3.0.1](https://raw.githubusercontent.com/api-evangelist/73-strings/refs/heads/main/openapi/73-strings-asset-info-openapi.yml)
- [Captable OpenAPI 3.0.1](https://raw.githubusercontent.com/api-evangelist/73-strings/refs/heads/main/openapi/73-strings-captable-openapi.yml)
- [Documents OpenAPI 3.0.1](https://raw.githubusercontent.com/api-evangelist/73-strings/refs/heads/main/openapi/73-strings-documents-openapi.yml)
- [Financial Data OpenAPI 3.0.1](https://raw.githubusercontent.com/api-evangelist/73-strings/refs/heads/main/openapi/73-strings-financial-data-openapi.yml)
- [Qualitative Data OpenAPI 3.0.1](https://raw.githubusercontent.com/api-evangelist/73-strings/refs/heads/main/openapi/73-strings-qualitative-data-openapi.yml)
- [Transaction OpenAPI 3.0.1](https://raw.githubusercontent.com/api-evangelist/73-strings/refs/heads/main/openapi/73-strings-transaction-api-openapi.yml)

## Semantics an agent must know

- [API conventions](https://raw.githubusercontent.com/api-evangelist/73-strings/refs/heads/main/conventions/73-strings-conventions.yml): All 23 operations are POST, including reads. No pagination. No idempotency key. HTTP 202 on 18 operations with no documented polling contract. HTTP 207 partial success on bulk transaction ingest.
- [Error catalog](https://raw.githubusercontent.com/api-evangelist/73-strings/refs/heads/main/errors/73-strings-problem-types.yml): Proprietary `{response, success, message, errorCode}` envelope — not RFC 9457. A business failure can arrive on HTTP 200 (`EXCE00021` "Data not found."). Read `success` and `errorCode`, never the HTTP status alone.
- [Authentication](https://raw.githubusercontent.com/api-evangelist/73-strings/refs/heads/main/authentication/73-strings-authentication.yml): apiKey only — `subscription-key` in header or query. No OAuth, no OIDC.
- [Data model](https://raw.githubusercontent.com/api-evangelist/73-strings/refs/heads/main/data-model/73-strings-data-model.yml): The same portfolio company is `entityId` in some APIs and `companyId` in others. Ids are bare UUIDs with no type prefix.
- [Rate limits](https://raw.githubusercontent.com/api-evangelist/73-strings/refs/heads/main/rate-limits/73-strings-rate-limits.yml): Starter product is 5 calls/minute, 100 calls/week. 429 on throttle with no Retry-After header.
- [Lifecycle](https://raw.githubusercontent.com/api-evangelist/73-strings/refs/heads/main/lifecycle/73-strings-lifecycle.yml): URI-path versioning (v1 and v2 coexist). No deprecation policy, no status page, no SLA, no changelog.
- [Agent skills](https://raw.githubusercontent.com/api-evangelist/73-strings/refs/heads/main/skills/_index.yml)

## Docs

- [Developer portal](https://api-accord-eut-73strings.developer.azure-api.net/)
- [API list](https://api-accord-eut-73strings.developer.azure-api.net/apis)
- [Products and subscriptions](https://api-accord-eut-73strings.developer.azure-api.net/products)
- [Sign up](https://api-accord-eut-73strings.developer.azure-api.net/signup)
- [Company website](https://www.73strings.com/)
- [73 Value](https://www.73strings.com/solutions/value/)
- [73 Monitor](https://www.73strings.com/solutions/monitor/)
- [73 Extract](https://www.73strings.com/solutions/extract/)
- [Blog](https://www.73strings.com/insights/blog/)
- [Terms of use](https://www.73strings.com/terms-and-use/)
- [Privacy policy](https://www.73strings.com/privacy-policy/)

## Optional

- Support: support@73strings.com
- No MCP server, no A2A agent card, no GraphQL endpoint, no AsyncAPI, no webhooks, no SDKs, no CLI and no public GitHub repositories were found for 73 Strings as of 2026-08-05.
- Two further Azure API Management instances exist (api-usa-73strings and api-73strings) whose developer portals publish no API catalogue anonymously; the EU instance (api-accord-eut-73strings) is the one with a public catalogue.