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com.seqbench/workbench
com.seqbench/workbench in the official MCP registry.
Endpoint https://seqbench.com/api/mcp.
The registry describes it as: Hosted DNA/RNA/protein tools: primers, oligos, PCR, cloning, CRISPR, alignment, batch & pipelines.
We read its 155 tools on 2026-10-21 and our rules matched something worth a look. We show the rule and where it fired, not the flagged text, because that text may be written to instruct an agent. Read the server's tool descriptions yourself before you connect it.
pi.invisible_unicodemedium | Hidden or deceptive Unicode (zero-width, bidi-control, or homoglyphs) in text tool oligo_cofold, line 2 |
pi.invisible_unicodemedium | Hidden or deceptive Unicode (zero-width, bidi-control, or homoglyphs) in text tool qpcr_ddct, line 2 |
A rule matching is a signal, not a verdict on the people who run the server. If you run it and think this is wrong, write to contact@lazaretto.dev and we will look.
Tools it advertises
reverse_complement gc_content translate find_orfs format_sequence motif_discover motif_finder reverse_translate random_sequence melting_temperature annealing_temperature oligo_analysis in_silico_pcr primer_design qpcr_assay_design dna_molarity site_directed_mutagenesis oligo_pool_screen cross_dimer primer_specificity oligo_cofold barcode_design barcode_audit oligo_order_check restriction_sites double_digest cloning_simulate plasmid_annotate construct_qc construct_autofix virtual_gel ligation_setup gel_band_size expression_cassette_check golden_gate_from_parts golden_gate_library build_route_plan assembly_outcomes diagnostic_digest repeat_instability nonrepetitive_parts_find nonrepetitive_parts_design operon_scan operon_design synthesis_complexity band_traceback sanger_indel_spectrum outcome_deconvolve trace_secondary_peaks trace_diagnose primer_site_accessibility promoter_predict promoter_library_design cloning_next_observation read_placement_plan base_edit_quant sanger_knockin_quant editing_plate_quantify multiplex_panel_design cloning_diagnose and 95 more
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[](https://lazaretto.dev/mcp-registry/com-seqbench-workbench)How this was checked
Lazaretto connects to the endpoint the way any MCP client does, asks the server to introduce itself and list its tools, and reads every name, description, parameter schema and server instruction for tool poisoning: hidden directive blocks, orders to read local secrets, parameters built to carry secrets or the conversation out, orders that redirect another server's tools, and invisible characters. It never calls a tool. What we found across the registry.
To run the same check every time Claude Code adds a server, install the free lazaretto-guard plugin. Browse every server in the index.