MCP Connector 1.5 Reference

String

Comma-separated list of protocols enabled for this context.

String

Comma-separated list of cipher suites enabled for this context.

Truststore

Configures the TLS truststore.

Keystore

Configures the TLS keystore.

Configures a revocation checking mechanism.

String

Path to the truststore. Mule resolves the path relative to the current classpath and file system.

String

Password used to protect the truststore.

String

Type of store.

String

Encryption algorithm that the truststore uses.

Boolean

If true, Mule stops performing certificate validations. Setting this to true can make connections vulnerable to attacks.

String

Path to the keystore. Mule resolves the path relative to the current classpath and file system.

String

Type of store.

String

Alias of the key to use when the keystore contains multiple private keys. By default, Mule uses the first key in the file.

String

Password used to protect the private key.

String

Password used to protect the keystore.

String

Encryption algorithm that the keystore uses.

Boolean

Which elements to verify in the certificate chain:

Verify only the last element in the certificate chain.

Verify all elements in the certificate chain.

Boolean

How to check certificate validity:

Check the Certification Revocation List (CRL) for certificate validity.

Use the Online Certificate Status Protocol (OCSP) to check certificate validity.

Boolean

Whether to use the secondary method to check certificate validity:

Use the method that wasn’t specified in the Prefer Crls field (the secondary method) to check certificate validity.

Don’t use the secondary method to check certificate validity.

Boolean

What to do if the revocation server can’t be reached or is busy:

Avoid verification failure.

Allow the verification to fail.

String

URL of the OCSP responder.

String

Alias of the signing certificate for the OCSP response. If specified, the alias must be in the truststore.

String

Path to the CRL file.

Boolean

When the application is deployed, a connectivity test is performed on all connectors. If set to true, deployment fails if the test doesn’t pass after exhausting the associated reconnection strategy.

Reconnection strategy to use.

Number

Configures the maximum amount of time that a dynamic configuration instance can remain idle before Mule considers it eligible for expiration.

Enumeration, one of:

Time unit for the Max Idle Time field.

Array of Call Tool Response Content

The contents generated by the tool

Yes

Boolean

Whether the tool execution was successful or errored out. Notice that even in case of error, contents might have been generated.

false

Enumeration, one of:

Content type.

Yes

String

Content’s payload when type is text.

String

Content’s MIME type.

Binary

Content’s payload when type is image.

Resource Content

Content’s payload when type is resource.

Array of Enumeration, one of:

Describes who the intended consumer of this data is. It can include multiple entries to indicate content useful for multiple audiences.

Number

Describes how important this data is for operating the server. A value of 1 means "most important", which indicates that the data is required. A value of 0 means "least important", which indicates that the data is entirely optional.

String

Resource URI

Yes

String

Resource MIME type.

Yes

String

Content of a text resource. Null for BLOB data types.

Binary

Content of a BLOB resource. Null for text data types.

Enumeration, one of:

String

Yes

String

Resource URI.

Yes

String

Name of the resource.

Yes

String

Description of the resource.

Yes

String

MIME type of the resource.

Yes

Number

The amount of memory to allocate to consume the stream and provide random access to it. If the stream contains more data than can fit into this buffer, then the buffer expands according to the Buffer Size Increment value, with an upper limit of the Max In Memory Size value. instances.

100

Number

Amount by which the buffer size expands if it exceeds its initial size. Setting a value of 0 or lower specifies that the buffer can’t expand.

100

Number

Maximum size of the buffer. If the buffer size exceeds this value, Mule raises a STREAM_MAXIMUM_SIZE_EXCEEDED error. A value of less than or equal to 0 means no limit.

Number

Maximum number of instances to keep in memory. If more than the maximum is required, content on the disk is buffered.

Enumeration, one of:

Unit for the In Memory Objects field.

String

Name of the tool.

Yes

String

A detailed enough description for an LLM to determine when to call this tool.

Yes

String

JSON Schema describing the tool’s input parameters.

Yes

String

Yes

Object

Yes

Certificate Data

Number

Array of String

Binary

Array of String

Array of Certificate Extension

Array of Alternative Name Data

Principal Data

Array of Boolean

X500 Principal Data

Array of Boolean

String

Array of String

Date

Date

Public Key Data

Number

Serial Number Data

String

String

Binary

Binary

Array of Alternative Name Data

Principal Data

X500 Principal Data

String

Number

Boolean

String

Binary

String

Number

String

String

String

String

Binary

Number

Number

String

Number

Number

Maximum number of times that a redelivered request can be processed unsuccessfully before returning a REDELIVERY_EXHAUSTED error.

String

Secure hashing algorithm to use if the Use Secure Hash field is true. If the payload of the message is a Java object, Mule ignores this value and returns the value that the payload’s hashCode() returned.

Redelivery Policy Message Identifier

One or more expressions that determine if a message was redelivered. This property can be set only if the Use Secure Hash field is false.

ObjectStore

Configures the object store that stores the redelivery counter for each message.

Boolean

If true, Mule uses a secure hash algorithm to identify a redelivered message.

String

One or more expressions that determine when a message was redelivered. You can set this property only if the Use Secure Hash field is false.

String

Yes

String

Yes

String

Yes

Object

Additional values attached to the request as HTTP Headers.

Yes

Certificate Data

Client certificate used to authenticate the request.

String

Text content.

Yes

Array of Enumeration, one of:

Describes who the intended consumer of this data is. It can include multiple entries to indicate content that’s useful for multiple audiences.

Number

Describes how important this data is for operating the server. A value of 1 means "most important", which indicates that the data is required. A value of 0 means "least important", which indicates that the data is entirely optional.

Array of Enumeration, one of:

Describes who the intended consumer of this data is. It can include multiple entries to indicate content useful for multiple audiences.

Number

Describes how important this data is for operating the server. A value of 1 means "most important", which indicates that the data is required. A value of 0 means "least important", which indicates that the data is entirely optional.

Binary

The raw image content, without Base64 encoding.

String

The image MIME type.

Array of Enumeration, one of:

Describes who the intended consumer of this data is. It can include multiple entries to indicate content useful for multiple audiences.

Number

Describes how important this data is for operating the server. A value of 1 means "most important", which indicates that the data is required. A value of 0 means "least important", which indicates that the data is entirely optional.

String

Resource URI.

String

The resource MIME type.

String

Resource text.

Array of Enumeration, one of:

Describes who the intended consumer of this data is. It can include multiple entries to indicate content useful for multiple audiences.

Number

Describes how important this data is for operating the server. A value of 1 means "most important", which indicates that the data is required. A value of 0 means "least important", which indicates that the data is entirely optional.

Binary

The raw resource content, without Base64 encoding.

Yes

String

Resource URI.

String

The resource MIME type.

String

Text content.

Yes

Binary

The raw blob content, without Base64 encoding.

Yes

Boolean

true when the remote tool returned structured content and the payload was set to the structured object (or to JSON parsed from a single text content).

Call Tool Response

The full tool response returned by the server, including all content items. Useful when Extract Structured Content is true and you still need the original response.

String

Optional description of the prompt returned by the server.

Array of Prompt Message Response

The rendered prompt messages.

Yes

String

Role associated with the message (typically user or assistant).

Yes

One of:

The content of the prompt message.

Yes

String

Prompt name.

Yes

String

Short, human-friendly title.

String

Description of the prompt.

Array of Prompt Argument Metadata

Argument definitions for the prompt.

String

Argument name.

Yes

String

Short, human-friendly title.

String

Description of the argument.

Boolean

Whether the argument is required.

false

String

The prompt name that was requested.

Yes

Object

Map of arguments provided by the client.

String

Argument name.

Yes

String

Description of the argument.

Boolean

Whether the argument is required.

false

String

The JSON schema content.

Yes

String

The path to the JSON schema file.

Yes

String

The message text. Supports DataWeave expressions.

Yes

Enumeration, one of:

Role associated with the message.

Array of Enumeration, one of:

Describes who the intended consumer of this data is. It can include multiple entries to indicate content useful for multiple audiences.

Number

Describes how important this data is for operating the server. A value of 1 means "most important", which indicates that the data is required. A value of 0 means "least important", which indicates that the data is entirely optional.

One of:

The image data provided either inline (base64-encoded) or as a file reference.

Yes

String

The image MIME type.

Yes

Enumeration, one of:

Role associated with the message.

Array of Enumeration, one of:

Describes who the intended consumer of this data is. It can include multiple entries to indicate content useful for multiple audiences.

Number

Describes how important this data is for operating the server. A value of 1 means "most important", which indicates that the data is required. A value of 0 means "least important", which indicates that the data is entirely optional.

String

Resource URI.

Yes

String

The resource MIME type.

Yes

One of:

The resource content (text or blob).

Yes

Enumeration, one of:

Role associated with the message.

Array of Enumeration, one of:

Describes who the intended consumer of this data is. It can include multiple entries to indicate content useful for multiple audiences.

Number

Describes how important this data is for operating the server. A value of 1 means "most important", which indicates that the data is required. A value of 0 means "least important", which indicates that the data is entirely optional.

String

Resource URI.

Yes

String

Name of the linked resource.

String

Human-friendly title.

String

Description.

String

MIME type of the linked resource.

Number

Size of the linked resource.

Enumeration, one of:

Role associated with the message.

Array of Enumeration, one of:

Describes who the intended consumer of this data is. It can include multiple entries to indicate content useful for multiple audiences.

Number

Describes how important this data is for operating the server. A value of 1 means "most important", which indicates that the data is required. A value of 0 means "least important", which indicates that the data is entirely optional.

String

The text content.

Yes

Binary

The raw blob content, without Base64 encoding.

Yes

Binary

The image data.

Yes

String

The path to the image file.

Yes

String

The text content.

Yes

String

The image MIME type.

Yes

Binary

The image data.

Yes

Resource Content

The embedded resource payload.

Yes

String

Resource URI.

Yes

String

Name of the linked resource.

String

Human-friendly title.

String

Description.

String

MIME type of the linked resource.

Number

Size of the linked resource.