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Custom JWT

To call APIs in NeuronEX, you need to first call the login interface to generate a JWT, and then call other interfaces to validate the JWT. The default JWT expires after one hour, and you can generate your own JWT to customize the expiration time.

When a user requests a RESTful API, please enter the Token in the http request header in the following format:

Authorization: Bearer

If the Token is correct, NeuronEX will return the result; otherwise, it will return the 401 code.

What is JWT?

JWT is an open standard (RFC 7519) for securely transmitting information. The JWT structure consists of three parts: header (Header), payload (Payload), and signature (Signature).

NeuronEX first checks the subdirectories etc of the NeuronEX installation directory to see if the iss field contains a corresponding .pem or .pub file. Then, it checks the fields inside the file for validation. The JWT structure required in NeuronEX is as follows:

    "alg": "RS256",
    "typ": "JWT"

    "iss": "username",
    "iat": "1679622798",
    "exp": "1679626398",
    "aud": "neuron",
    "bodyEncode": "0"
  • Token type (typ): JWT
  • Algorithm used (alg): RS256


  • Issuer (iss): Define it yourself according to your needs, but make sure it is consistent with the name of the public key file generated. For example, if iss is neuron, you need to generate the neuron.pem public key file.
  • Issued at (iat): Issue time
  • Expiration time (exp): Issue expiration time
  • Audience (aud): NeuronEX, cannot be modified

Generate public and private keys

Before signing the JWT, you need to generate a pair of public and private keys, and put the generated public key public.pem in the subdirectories of the NeuronEX installation directory etc. NeuronEX automatically loads files in certs and decodes them using the public key.


The default installation path for Docker and deb/rpm packages is /opt/neuron.

The public key file name must be consistent with the issuer in the JWT.

Use the OpenSSL command-line tool to generate RSA keys:

# Generate private key
$ openssl genrsa -out private.key 2048
# Generate public key
$ openssl rsa -in private.key -out public.pem -pubout

How to generate JWT?

Use the JWT official website tool to generate. In Decoded, fill in:

  • Algorithm: RS256
  • Header: Header
  • Payload: Payload
  • Verify Signature: Fill in the public and private keys -----BEGIN PUBLIC KEY----- and -----BEGIN RSA PRIVATE KEY-----.