CUSIP Data API

Name: CUSIP Data API API
Brand: CUSIP Data API
Availability: InStock

★ Only Publicly Available OpenAPI DocumentFinanceBankingapiKey17 EndpointsREST

For Agents

Resolve CUSIP and ISIN identifiers, look up issuer and security metadata, map tickers to CUSIPs, and search syndicated loan, option, and carbon credit instruments.

Quickstart

Get started with CUSIP Data API in minutes using your preferred integration method.

# Add to your MCP client config (Claude Desktop, Cursor, Windsurf)
{
  "jentic": {
    "url": "https://api.jentic.com/mcp",
    "auth": "oauth"
  }
}

# Then ask your agent:
"look up cusip for a financial security"

# → Jentic returns the GET /events tool with parameter schema, agent executes.

Capabilities

What an agent can do with CUSIP Data API API.

Resolve a CUSIP or ISIN to security metadata including issuer, issue type, and identifier history

Map a ticker symbol on a specific exchange to the corresponding CUSIP and ISIN

Search syndicated loan CUSIPs by deal, agent, and borrower attributes

Look up option and future CUSIPs by underlying or comma-delimited identifier list

GET STARTED

Start building with CUSIP Data API API

Explore with Jentic

View OpenAPI Document

Use for: Resolve CUSIP 037833100 to issuer and security details, Find the CUSIP for an ISIN starting with US0378331005, Get the CUSIP for the ticker AAPL on NASDAQ, Search syndicated loan CUSIPs for a specific borrower

Not supported: Does not handle trading, settlement instructions, or pricing — use for CUSIP and ISIN identifier lookup and security reference data only.

Jentic publishes the only available OpenAPI document for CUSIP Data API, keeping it validated and agent-ready.

Jentic publishes the only available OpenAPI specification for CUSIP Data API, keeping it validated and agent-ready. CUSIP Data API exposes CUSIP Global Services' identifier database, the canonical reference for the nine-character CUSIP codes that uniquely identify financial securities for clearing and settlement. Endpoints cover CUSIP and ISIN lookup, syndicated loan and option/future identifiers, ticker symbol resolution, associated issuer and corporate-action search, and carbon credit (VCM) identifiers. Authentication is by an X-API-KEY header.

Use Cases

Patterns agents use CUSIP Data API API for, with concrete tasks.

★ Security Master Enrichment

Enrich an internal security master file by resolving CUSIPs and ISINs to canonical issuer, issue type, and identifier metadata from CGS. Treasury, fund administration, and middle-office teams use the CUSIP Data API to keep reference data accurate without manual data-vendor reconciliation. The API supports both single-identifier and comma-delimited list lookup for batch enrichment.

Call GET /cusip/{cusipList} with a comma-delimited list of 50 CUSIPs from the security master and persist the returned issuer and issue-type fields

Ticker to CUSIP Mapping

Map exchange ticker symbols to CUSIPs for trade matching, regulatory filings, and downstream systems that key on CGS identifiers. Use /cusipTickerSymbol/ticker/{tickerSymbol} to resolve a ticker, or /cusipTickerSymbol/cusip/{cusip} for the reverse direction.

Call GET /cusipTickerSymbol/ticker/AAPL to resolve the Apple Inc ticker to its CUSIP and ISIN for a trade ticket

Syndicated Loan Identifier Search

Search and resolve syndicated loan CUSIPs for loan trading, agent reporting, and portfolio reconciliation. The /cusip/loan/search and /cusip/loan/{cusip} endpoints expose CGS's loan identifier coverage with filters for borrower, agent, and deal attributes.

Call GET /cusip/loan/search with a borrower filter to retrieve all loan CUSIPs for that borrower for a portfolio review

Corporate Action and Issuer Research

Research issuer relationships and corporate-action history across the CUSIP database. Use /cusip/associatedIssuer/search to find related issuers under a parent and /cusip/corporateAction/search to surface action records (mergers, splits, name changes) for a CUSIP or issuer.

Call GET /cusip/corporateAction/search with the issuerNumber filter to surface all corporate actions affecting a parent issuer's outstanding securities

AI Agent Identifier Resolution via Jentic

An AI agent helping a research analyst convert a list of tickers, ISINs, and CUSIPs into a single identifier scheme uses Jentic to drive the CUSIP Data API. The agent searches for 'lookup cusip', loads the appropriate operation, supplies the identifier, and returns the resolved record without manual integration glue.

Use Jentic to search 'lookup cusip' and execute /cusip/{cusip} for each identifier in the analyst's list to produce a unified reference table

Key Endpoints

17 endpoints — jentic publishes the only available openapi specification for cusip data api, keeping it validated and agent-ready.

METHOD

PATH

DESCRIPTION

GET

/cusip/{cusip}

Resolve a CUSIP to security metadata

GET

/cusip/search

Search the CUSIP database with filters

GET

/isin/{isin}

Resolve an ISIN to CUSIP data

GET

/cusipTickerSymbol/ticker/{tickerSymbol}

Map a ticker to its CUSIP

GET

/cusip/loan/search

Search syndicated loan CUSIPs

GET

/cusip/option/{cusip_or_cusipList}

Resolve option and future CUSIPs

GET

/cusip/corporateAction/search

Search corporate-action records

GET

/cusip/vcm/{cusip}

Resolve a carbon credit CUSIP

GET

/cusip/{cusip}

Resolve a CUSIP to security metadata

GET

/cusip/search

Search the CUSIP database with filters

GET

/isin/{isin}

Resolve an ISIN to CUSIP data

GET

/cusipTickerSymbol/ticker/{tickerSymbol}

Map a ticker to its CUSIP

GET

/cusip/loan/search

Search syndicated loan CUSIPs

Why though Jentic?

Three things that make agents converge on Jentic-routed access.

Credential isolation

CUSIP X-API-KEY values are stored encrypted in the Jentic vault and injected into the request header at call time. Raw keys remain outside the agent's context and prompt history.

Intent-based discovery

Agents search by intent (e.g. 'lookup cusip' or 'ticker to cusip') and Jentic returns the matching CUSIP Data operation with its parameter schema.

Time to first call

Direct CUSIP Data integration: 1-2 days for auth, contract review, and identifier-format handling. Through Jentic: under 1 hour — search, load, execute.

Related APIs

Alternatives and complements available in the Jentic catalogue.

Alternative

OpenFIGI API

Bloomberg's free FIGI identifier mapping covering global instruments

Choose OpenFIGI when you need a free identifier scheme that covers global instruments without CGS licensing.

Complementary

Polygon.io

Market data provider that pairs price and quote feeds with reference data

Pair with the CUSIP Data API when you need both canonical identifiers and live or historical pricing for the same securities.

Complementary

Finnhub

Market data and fundamentals provider with ticker and company resolution

Use alongside CUSIP Data when you need to attach fundamentals or news to identifiers resolved from CGS.

FAQs

Specific to using CUSIP Data API API through Jentic.

Why is there no official OpenAPI spec for CUSIP Data API?

CUSIP Global Services does not publish an OpenAPI specification. Jentic generates and maintains this spec so that AI agents and developers can call CUSIP Data API via structured tooling. It is validated against the live API and kept up to date. Get started at https://app.jentic.com/sign-up.

What authentication does the CUSIP Data API use?

The API uses an API key sent in the X-API-KEY request header. Through Jentic the key is held in the encrypted vault and injected at execution time, so the raw key never enters the agent's prompt.

Can I look up a CUSIP from an ISIN with the CUSIP Data API?

Yes. Call GET /isin/{isin} for a single ISIN or GET /isin/{isinList} for a comma-delimited list. The response returns the corresponding CUSIP records with issuer and issue metadata.

What are the rate limits for the CUSIP Data API?

Rate limits are governed by the CGS commercial agreement and are not encoded in the spec. Limits scale with the licensed data tier; check your CGS contract for the precise quota.

How do I map a stock ticker to its CUSIP through Jentic?

Run pip install jentic, search for 'ticker to cusip', load /cusipTickerSymbol/ticker/{tickerSymbol}, and execute it with the ticker. Jentic returns the matching CUSIP and ISIN.

Does the CUSIP Data API cover syndicated loans and options?

Yes. Use /cusip/loan/{cusip} and /cusip/loan/search for syndicated loans, and /cusip/option/{cusip_or_cusipList} and /cusip/option/search for options and futures.