Logos RFP-021: Trustless Ethereum State Attestation for LEZ

Logos posted RFP-021 on October 15, 2026, inviting proposals for a reusable LEZ primitive that verifies Ethereum consensus and finality, verifies that referenced state is included under a finalised Ethereum header, and emits a verified statement any LEZ program can consume, with no trusted intermediary. Tier M; estimated development duration 8 to 12 weeks; MIT and Apache 2.0 dual license. Submission deadline: 11 November 2026 (UTC).

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ASCON 2026 agent economics competition

Nyx Foundation's ASCON (Agentic Simulation for eCONomics competition) has a JPY 5,000,000 total prize pool for AI agents that trade, attack and verify inside a simulated market built on Nyx's Eris Ethereum L2 devnet. Registration runs September 1 to October 24, 2026; agent submissions are due by October 31, and the competition runs November 1 to 7. Entry is free, but participants pay their own AI costs.

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Alchemy Arc Credits Program: up to $10K in Alchemy credits per team building on Arc

Alchemy is offering up to $10K in credits per team for teams building on Arc, now that Arc mainnet is live on Alchemy. Credits are applied directly to the team's Alchemy account for a 90-day evaluation, with no lock-in and no proprietary APIs. Teams apply through a form on Alchemy's page and Alchemy says it will be in touch within 5 business days. No deadline stated.

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Cetus expands its HackenProof smart contract bug bounty: Critical findings now up to $1M

Cetus has increased the reward budget of its smart contract bug bounty on HackenProof and broadened the program scope, with Critical findings eligible for up to $1M (up to 10% of the total funds at risk, capped at $1,000,000). Reward tiers: Critical $30,000 to $1,000,000, High $3,000 to $30,000, Medium $100 to $1,000, Low $10 to $100. KYC required. No deadline stated.

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Paxos Labs launches a $500K bug bounty on Immunefi for Transit and PAXGy

Paxos Labs has launched a bug bounty on Immunefi covering Transit, a stablecoin conversion protocol that settles swaps between pegged tokens on the same chain or across chains, and PAXGy, tokenized gold that grows in gold terms. Critical smart contract findings pay up to $500,000 (minimum $10,000), High $5,000 to $10,000, and Medium a flat $1,000, paid in USDG on Ethereum. PoC and KYC required. Live since 20 October 2026. No deadline stated.

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Public RFP: Research on Cardano's utxoCostPerByte Parameter

Request for Proposals invites researchers and technical experts, individually or in teams, to submit proposals for investigating how far Cardano’s utxoCostPerByte protocol parameter can safely be reduced.

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Flap Ecosystem Fund Season 4: another $100,000 for community events, creators and developer education

The round supports ecosystem events and community meetups, content creators and artists, developer tutorials and educational resources, developer communities and forums, and online AMAs and technical workshops. Apply through the form linked in Flap's announcement. No deadline stated.

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Arbitrum Mentorship Program Cohort 2 Applications Open

The Arbitrum Foundation has opened applications for Cohort 2 of the Arbitrum Mentorship Program, run with Robinhood Chain, for early-stage teams building on Arbitrum One and Robinhood Chain, with $100K in prizes for top-performing teams. Applications are open until December 6, 2026 and are reviewed on an ongoing basis.

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HSK Chain Horizon Hackathon Mumbai Edition

HSK Chain invites developers to the HSK Chain Horizon Hackathon (Mumbai Edition) on the tracks AI Agent Trading and Agent Payments & A2A Settlement, with a total prize pool of 10,000 USDT (5,000 USDT per track). Projects must be built on HSK Chain. Register and submit the build on the DoraHacks page; the final submission deadline is November 1, 2026, at 21:30 IST (UTC+5:30), equivalent to November 2, 2026, at 00:00 Beijing Time (UTC+8).

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Aero Bug Bounty on Sherlock: up to 500,000 USDC

Aero runs a bug bounty on Sherlock, live since Oct 21, 2026, with max rewards of 500,000 USDC. Scope and severity tiers are set on the Sherlock program page, and reports go through Sherlock. Rolling, no end date stated.

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UBC 2026 Hackathon

University Blockchain Conference offers $23K in prizes across three main tracks (Agentic Payments & AI, DeFi & Onchain Apps, Consumer Apps) plus bounties and perks, with each main track paying $2,000 1st, $1,250 2nd, $750 3rd. Online build runs Nov 13-20; submit by Nov 20, 12 PM CST on Devpost; finals Nov 21 at UT Austin.

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IXH26 Italian XRPL Hackathon

At the University of Bari, organized by Ripple's University Blockchain Research Initiative (UBRI), XRPL Commons, De Componendis Cifris and the University of Bari Aldo Moro, with a total prize pool of EUR 12,000: EUR 2,000, EUR 1,200 and EUR 800 to the top three projects in each of three tracks (advanced cryptography for blockchain, XRPL applications, tokenisation on XRPL). Teams of 3-8; registration requires host approval and closes on Tuesday, November 17.

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Base Trencher Grant Program

Base introduced the Trencher Grant Program: get up to $5,000 for leading a community or creating content about Base culture.

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AI Yako: Own Your AI hackathon in Nairobi

Tether is running an in-person QVAC hackathon at the Node NBO campus in Nairobi, Kenya, with a 3,500 USDt prize pool. Projects are due on DoraHacks by Friday 30 October, 17:00 EAT (14:00 UTC), and demo day with judging and awards is Saturday 31 October. Each team submits one project with a public repository and a demo video.

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Dev3pack Solana University Hackathon

Dev3pack is running a three-day Solana university hackathon from 27-29 November 2026, online or at one of 40+ local build stations worldwide, with $10K+ in prizes plus local tracks and the best projects getting into its accelerator. Apply at https://hack.dev3pack.xyz/

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Ink Spark builder grants: 500-20,000 USDC for live projects on Ink

Spark is Ink's builder grant track for live projects creating measurable ecosystem progress on Ink. Ink says it is especially interested in projects building around Tydro, Nado, RWA infrastructure and AI/agent infrastructure, and applicants should show evidence of live activity. The application form asks for a requested grant amount of 500-20,000 USDC, and Ink reviews Spark applications in rolling batches. No deadline stated.

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stake.link bug bounty on CertiK Hunt: up to $250,000

stake.link, a liquid staking platform, has a bug bounty program live on CertiK Hunt, offering up to $250,000 in rewards to security researchers. The program has been live since October 21, 2026, lists Ethereum as its chain and uses severity-based rewards. No deadline stated.

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Guardian Defender contest with Templar Protocol: $100,000 award pool

Security firm Guardian has opened a Guardian Defender contest with Templar Protocol, with a $100,000 award pool funded by Guardian; Templar's Precept lending lets anyone create isolated lending pools on Stellar. The 30-day window opens October 26 and closes November 25, 2026, and participation details are in Guardian's post.

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Machine-Checked Devcon Week: online Lean 4 hackathon on Ethereum networking, $1,000 prize pool

Invisible Garden is running an online hackathon during Devcon week, 2 to 7 November 2026, where participants implement pieces of Ethereum's networking layer in Lean 4 and prove properties of what they build. Participation is free and curated, with a cohort of under ten contributors; acceptances are announced in the Invisible Garden Discord. Applications close 1 November 2026.

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Stellar Community Fund SCF #46 Build Awards: up to $150K in XLM per project

The Stellar Community Fund round SCF 46 is in its submission phase for Build Awards, which offer up to $150K in XLM per project, plus technical audits and access to accelerators and VCs. Teams submit an interest form and are invited to apply if eligible; the submission deadline is November 9, 2026.

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Zcash Coinholder-Directed Retroactive Grants Q4 2026 call for proposals

The program funds work that is already fully completed and publicly verifiable; anyone can submit their own work or nominate an individual, company or project. There is no fixed cap on request size, but grants above $50,000 require FPF KYC checks before disbursement. The program is funded by 12% of Zcash block rewards (ZIP 1016) plus initial capital from the Deferred Dev Fund Lockbox, and coinholders decide funding in a vote scheduled for December. Deadline to submit a proposal: November 13 at 20:00 UTC.

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