nymkappa

nymkappa (miner–validator)

nymkappa is a pseudonymous GitHub account whose public profile bio states: “I write humble code @ mempool.space.” (github.com)

In the Bitcoin miner sense, nymkappa also appears as a mining-entity identifier used by mempool.space: a commit to mempool/mining-pools adds a pool entry named “nymkappa” with a tag pattern /@nymkappa/ (intended for coinbase-tag matching) and links back to the GitHub profile. (github.com)
That same entry includes a payout address tb1..., which indicates testnet addressing rather than Bitcoin mainnet. (github.com)

What is publicly knowable from the referenced page

• Identity: No legal-name identity is asserted on the profile; it is presented as a handle (“nymkappa”). (github.com)
• Affiliation (self-described): Contributor/engineer “@ mempool.space.” (github.com)
• Miner-facing footprint: Listed/recognized as a mining tag in mempool.space’s mining-pool definition repository (via the mempool/mining-pools dataset). (github.com)

(In Bitcoin terminology there are miners, not validators; “miner–validator” here most naturally maps to a mining identity used for block attribution rather than a separate PoS validator role.) (github.com)